61590931 has 2 divisors, whose sum is σ = 61590932. Its totient is φ = 61590930.

The previous prime is 61590923. The next prime is 61590959. The reversal of 61590931 is 13909516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61590931 - 2³ = 61590923 is a prime.

It is a super-4 number, since 4×61590931⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (61590961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30795465 + 30795466.

It is an arithmetic number, because the mean of its divisors is an integer number (30795466).

Almost surely, 2^61590931 is an apocalyptic number.

61590931 is a deficient number, since it is larger than the sum of its proper divisors (1).

61590931 is an equidigital number, since it uses as much as digits as its factorization.

61590931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 61590931 is about 7847.9889780758. The cubic root of 61590931 is about 394.9167821272.

The spelling of 61590931 in words is "sixty-one million, five hundred ninety thousand, nine hundred thirty-one".