47970931 has 2 divisors, whose sum is σ = 47970932. Its totient is φ = 47970930.

The previous prime is 47970913. The next prime is 47970971. The reversal of 47970931 is 13907974.

Together with previous prime (47970913) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (47970971) can be obtained adding 47970931 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47970931 - 2⁷ = 47970803 is a prime.

It is a super-2 number, since 2×47970931² = 4602420442013522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47970971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23985465 + 23985466.

It is an arithmetic number, because the mean of its divisors is an integer number (23985466).

Almost surely, 2^47970931 is an apocalyptic number.

47970931 is a deficient number, since it is larger than the sum of its proper divisors (1).

47970931 is an equidigital number, since it uses as much as digits as its factorization.

47970931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 47970931 is about 6926.1050381870. The cubic root of 47970931 is about 363.3507400315.

The spelling of 47970931 in words is "forty-seven million, nine hundred seventy thousand, nine hundred thirty-one".