56640953 has 2 divisors, whose sum is σ = 56640954. Its totient is φ = 56640952.

The previous prime is 56640949. The next prime is 56640977. The reversal of 56640953 is 35904665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32855824 + 23785129 = 5732^2 + 4877^2 .

It is a cyclic number.

It is not a de Polignac number, because 56640953 - 2² = 56640949 is a prime.

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 (56648953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28320476 + 28320477.

It is an arithmetic number, because the mean of its divisors is an integer number (28320477).

Almost surely, 2^56640953 is an apocalyptic number.

It is an amenable number.

56640953 is a deficient number, since it is larger than the sum of its proper divisors (1).

56640953 is an equidigital number, since it uses as much as digits as its factorization.

56640953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 56640953 is about 7526.0184028476. The cubic root of 56640953 is about 384.0403445205.

The spelling of 56640953 in words is "fifty-six million, six hundred forty thousand, nine hundred fifty-three".