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47970397 = 108744131
BaseRepresentation
bin1011011011111…
…1100001011101
310100021011000101
42312333201131
544240023042
64432101101
71121512246
oct266774135
9110234011
1047970397
1125094962
1214094791
139c27667
146529ccd
1543286b7
hex2dbf85d

47970397 has 4 divisors (see below), whose sum is σ = 48015616. Its totient is φ = 47925180.

The previous prime is 47970371. The next prime is 47970443. The reversal of 47970397 is 79307974.

It can be divided in two parts, 479 and 70397, that added together give a triangular number (70876 = T376).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-47970397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47970317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20979 + ... + 23152.

It is an arithmetic number, because the mean of its divisors is an integer number (12003904).

Almost surely, 247970397 is an apocalyptic number.

It is an amenable number.

47970397 is a deficient number, since it is larger than the sum of its proper divisors (45219).

47970397 is a wasteful number, since it uses less digits than its factorization.

47970397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45218.

The product of its (nonzero) digits is 333396, while the sum is 46.

The square root of 47970397 is about 6926.0664882746. The cubic root of 47970397 is about 363.3493917843.

The spelling of 47970397 in words is "forty-seven million, nine hundred seventy thousand, three hundred ninety-seven".

Divisors: 1 1087 44131 47970397