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3988172971 = 31312141221
BaseRepresentation
bin1110110110110110…
…1011000010101011
3101021221110011211001
43231231223002223
531131433013341
61455424215431
7200554624306
oct35555530253
911257404731
103988172971
111767246422
1293376a577
134b7340383
1429b955b3d
151851dad31
hexedb6b0ab

3988172971 has 8 divisors (see below), whose sum is σ = 4118242688. Its totient is φ = 3858192000.

The previous prime is 3988172963. The next prime is 3988172989. The reversal of 3988172971 is 1792718893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3988172971 - 23 = 3988172963 is a prime.

It is a super-2 number, since 2×39881729712 = 31811047293229933682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3988170971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76141 + ... + 117361.

It is an arithmetic number, because the mean of its divisors is an integer number (514780336).

Almost surely, 23988172971 is an apocalyptic number.

3988172971 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3988172971 is a deficient number, since it is larger than the sum of its proper divisors (130069717).

3988172971 is a wasteful number, since it uses less digits than its factorization.

3988172971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44373.

The product of its digits is 1524096, while the sum is 55.

The square root of 3988172971 is about 63151.9831121715. The cubic root of 3988172971 is about 1585.8349876055.

The spelling of 3988172971 in words is "three billion, nine hundred eighty-eight million, one hundred seventy-two thousand, nine hundred seventy-one".

Divisors: 1 31 3121 41221 96751 1277851 128650741 3988172971