47847931 has 2 divisors, whose sum is σ = 47847932. Its totient is φ = 47847930.

The previous prime is 47847907. The next prime is 47847937. The reversal of 47847931 is 13974874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47847931 - 2⁷ = 47847803 is a prime.

It is a super-2 number, since 2×47847931² = 4578849001961522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47847937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23923965 + 23923966.

It is an arithmetic number, because the mean of its divisors is an integer number (23923966).

Almost surely, 2^47847931 is an apocalyptic number.

47847931 is a deficient number, since it is larger than the sum of its proper divisors (1).

47847931 is an equidigital number, since it uses as much as digits as its factorization.

47847931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 47847931 is about 6917.2198895221. The cubic root of 47847931 is about 363.0399240695.

The spelling of 47847931 in words is "forty-seven million, eight hundred forty-seven thousand, nine hundred thirty-one".