56622689 has 2 divisors, whose sum is σ = 56622690. Its totient is φ = 56622688.

The previous prime is 56622661. The next prime is 56622739. The reversal of 56622689 is 98622665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36300625 + 20322064 = 6025^2 + 4508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56622689 is a prime.

It is a super-2 number, since 2×56622689² = 6412257819181442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56622649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28311344 + 28311345.

It is an arithmetic number, because the mean of its divisors is an integer number (28311345).

Almost surely, 2^56622689 is an apocalyptic number.

It is an amenable number.

56622689 is a deficient number, since it is larger than the sum of its proper divisors (1).

56622689 is an equidigital number, since it uses as much as digits as its factorization.

56622689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 56622689 is about 7524.8049144147. The cubic root of 56622689 is about 383.9990618648. Note that the first 3 decimals are identical.

The spelling of 56622689 in words is "fifty-six million, six hundred twenty-two thousand, six hundred eighty-nine".