56339681 has 2 divisors, whose sum is σ = 56339682. Its totient is φ = 56339680.

The previous prime is 56339677. The next prime is 56339729. The reversal of 56339681 is 18693365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39488656 + 16851025 = 6284^2 + 4105^2 .

It is a cyclic number.

It is not a de Polignac number, because 56339681 - 2² = 56339677 is a prime.

It is a super-2 number, since 2×56339681² = 6348319310363522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56339671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28169840 + 28169841.

It is an arithmetic number, because the mean of its divisors is an integer number (28169841).

Almost surely, 2^56339681 is an apocalyptic number.

It is an amenable number.

56339681 is a deficient number, since it is larger than the sum of its proper divisors (1).

56339681 is an equidigital number, since it uses as much as digits as its factorization.

56339681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 56339681 is about 7505.9763522143. The cubic root of 56339681 is about 383.3582329552.

The spelling of 56339681 in words is "fifty-six million, three hundred thirty-nine thousand, six hundred eighty-one".