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8872981 = 131935923
BaseRepresentation
bin100001110110…
…010000010101
3121200210102221
4201312100111
54232413411
6514102341
7135263515
oct41662025
917623387
108872981
115010447
122b7a9b1
131ab88b0
14126d845
15ba4071
hex876415

8872981 has 8 divisors (see below), whose sum is σ = 10058720. Its totient is φ = 7759152.

The previous prime is 8872979. The next prime is 8872991. The reversal of 8872981 is 1892788.

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 8872981 - 21 = 8872979 is a prime.

It is a super-2 number, since 2×88729812 = 157459583652722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8872901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17715 + ... + 18208.

It is an arithmetic number, because the mean of its divisors is an integer number (1257340).

Almost surely, 28872981 is an apocalyptic number.

It is an amenable number.

8872981 is a deficient number, since it is larger than the sum of its proper divisors (1185739).

8872981 is a wasteful number, since it uses less digits than its factorization.

8872981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35955.

The product of its digits is 64512, while the sum is 43.

The square root of 8872981 is about 2978.7549412464. The cubic root of 8872981 is about 207.0251861658.

The spelling of 8872981 in words is "eight million, eight hundred seventy-two thousand, nine hundred eighty-one".

Divisors: 1 13 19 247 35923 466999 682537 8872981