47157839 has 2 divisors, whose sum is σ = 47157840. Its totient is φ = 47157838.

The previous prime is 47157823. The next prime is 47157841. The reversal of 47157839 is 93875174.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47157839 - 2⁴ = 47157823 is a prime.

It is a Sophie Germain prime.

Together with 47157841, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47157839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47157899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23578919 + 23578920.

It is an arithmetic number, because the mean of its divisors is an integer number (23578920).

Almost surely, 2^47157839 is an apocalyptic number.

47157839 is a deficient number, since it is larger than the sum of its proper divisors (1).

47157839 is an equidigital number, since it uses as much as digits as its factorization.

47157839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 44.

The square root of 47157839 is about 6867.1565440144. The cubic root of 47157839 is about 361.2861378343.

The spelling of 47157839 in words is "forty-seven million, one hundred fifty-seven thousand, eight hundred thirty-nine".