56649037 has 2 divisors, whose sum is σ = 56649038. Its totient is φ = 56649036.

The previous prime is 56649031. The next prime is 56649041. The reversal of 56649037 is 73094665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51423241 + 5225796 = 7171^2 + 2286^2 .

It is a cyclic number.

It is not a de Polignac number, because 56649037 - 2³ = 56649029 is a prime.

It is a super-2 number, since 2×56649037² = 6418226786054738, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56649031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28324518 + 28324519.

It is an arithmetic number, because the mean of its divisors is an integer number (28324519).

Almost surely, 2^56649037 is an apocalyptic number.

It is an amenable number.

56649037 is a deficient number, since it is larger than the sum of its proper divisors (1).

56649037 is an equidigital number, since it uses as much as digits as its factorization.

56649037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 56649037 is about 7526.5554538580. Note that the first 3 decimals coincide. The cubic root of 56649037 is about 384.0586141899.

The spelling of 56649037 in words is "fifty-six million, six hundred forty-nine thousand, thirty-seven".