56876681 has 2 divisors, whose sum is σ = 56876682. Its totient is φ = 56876680.

The previous prime is 56876669. The next prime is 56876683. The reversal of 56876681 is 18667865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56866681 + 10000 = 7541^2 + 100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56876681 is a prime.

It is a super-2 number, since 2×56876681² = 6469913683151522, which contains 22 as substring.

Together with 56876683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56876683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28438340 + 28438341.

It is an arithmetic number, because the mean of its divisors is an integer number (28438341).

Almost surely, 2^56876681 is an apocalyptic number.

It is an amenable number.

56876681 is a deficient number, since it is larger than the sum of its proper divisors (1).

56876681 is an equidigital number, since it uses as much as digits as its factorization.

56876681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 56876681 is about 7541.6630128905. The cubic root of 56876681 is about 384.5723727871.

The spelling of 56876681 in words is "fifty-six million, eight hundred seventy-six thousand, six hundred eighty-one".