56942681 has 2 divisors, whose sum is σ = 56942682. Its totient is φ = 56942680.

The previous prime is 56942663. The next prime is 56942693. The reversal of 56942681 is 18624965.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32775625 + 24167056 = 5725^2 + 4916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56942681 is a prime.

It is a super-2 number, since 2×56942681² = 6484937838935522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56942651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28471340 + 28471341.

It is an arithmetic number, because the mean of its divisors is an integer number (28471341).

Almost surely, 2^56942681 is an apocalyptic number.

It is an amenable number.

56942681 is a deficient number, since it is larger than the sum of its proper divisors (1).

56942681 is an equidigital number, since it uses as much as digits as its factorization.

56942681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 56942681 is about 7546.0374369599. The cubic root of 56942681 is about 384.7210685546.

The spelling of 56942681 in words is "fifty-six million, nine hundred forty-two thousand, six hundred eighty-one".