47117857 has 2 divisors, whose sum is σ = 47117858. Its totient is φ = 47117856.

The previous prime is 47117849. The next prime is 47117867. The reversal of 47117857 is 75871174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44076321 + 3041536 = 6639^2 + 1744^2 .

It is a cyclic number.

It is not a de Polignac number, because 47117857 - 2³ = 47117849 is a prime.

It is not a weakly prime, because it can be changed into another prime (47117867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23558928 + 23558929.

It is an arithmetic number, because the mean of its divisors is an integer number (23558929).

Almost surely, 2^47117857 is an apocalyptic number.

It is an amenable number.

47117857 is a deficient number, since it is larger than the sum of its proper divisors (1).

47117857 is an equidigital number, since it uses as much as digits as its factorization.

47117857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54880, while the sum is 40.

The square root of 47117857 is about 6864.2448237224. The cubic root of 47117857 is about 361.1840054572.

It can be divided in two parts, 47117 and 857, that added together give a palindrome (47974).

The spelling of 47117857 in words is "forty-seven million, one hundred seventeen thousand, eight hundred fifty-seven".