47910857 has 2 divisors, whose sum is σ = 47910858. Its totient is φ = 47910856.

The previous prime is 47910853. The next prime is 47910859. The reversal of 47910857 is 75801974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27290176 + 20620681 = 5224^2 + 4541^2 .

It is a cyclic number.

It is not a de Polignac number, because 47910857 - 2² = 47910853 is a prime.

Together with 47910859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47910851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23955428 + 23955429.

It is an arithmetic number, because the mean of its divisors is an integer number (23955429).

Almost surely, 2^47910857 is an apocalyptic number.

It is an amenable number.

47910857 is a deficient number, since it is larger than the sum of its proper divisors (1).

47910857 is an equidigital number, since it uses as much as digits as its factorization.

47910857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 47910857 is about 6921.7668987044. The cubic root of 47910857 is about 363.1990019549.

The spelling of 47910857 in words is "forty-seven million, nine hundred ten thousand, eight hundred fifty-seven".