61356731 has 2 divisors, whose sum is σ = 61356732. Its totient is φ = 61356730.

The previous prime is 61356727. The next prime is 61356739. The reversal of 61356731 is 13765316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61356731 - 2² = 61356727 is a prime.

It is a super-2 number, since 2×61356731² = 7529296878012722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61356739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30678365 + 30678366.

It is an arithmetic number, because the mean of its divisors is an integer number (30678366).

Almost surely, 2^61356731 is an apocalyptic number.

61356731 is a deficient number, since it is larger than the sum of its proper divisors (1).

61356731 is an equidigital number, since it uses as much as digits as its factorization.

61356731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 32.

The square root of 61356731 is about 7833.0537467836. The cubic root of 61356731 is about 394.4155882672.

The spelling of 61356731 in words is "sixty-one million, three hundred fifty-six thousand, seven hundred thirty-one".