47136807931 has 2 divisors, whose sum is σ = 47136807932. Its totient is φ = 47136807930.

The previous prime is 47136807923. The next prime is 47136807961. The reversal of 47136807931 is 13970863174.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47136807931 - 2³ = 47136807923 is a prime.

It is a super-2 number, since 2×47136807931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47136807961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23568403965 + 23568403966.

It is an arithmetic number, because the mean of its divisors is an integer number (23568403966).

Almost surely, 2^47136807931 is an apocalyptic number.

47136807931 is a deficient number, since it is larger than the sum of its proper divisors (1).

47136807931 is an equidigital number, since it uses as much as digits as its factorization.

47136807931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 47136807931 in words is "forty-seven billion, one hundred thirty-six million, eight hundred seven thousand, nine hundred thirty-one".