56640629 has 4 divisors (see below), whose sum is σ = 56909280. Its totient is φ = 56371980.

The previous prime is 56640613. The next prime is 56640637. The reversal of 56640629 is 92604665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92604665 = 5 ⋅18520933.

It is a cyclic number.

It is not a de Polignac number, because 56640629 - 2⁴ = 56640613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56640592 and 56640601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56640659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134009 + ... + 134430.

It is an arithmetic number, because the mean of its divisors is an integer number (14227320).

Almost surely, 2^56640629 is an apocalyptic number.

It is an amenable number.

56640629 is a deficient number, since it is larger than the sum of its proper divisors (268651).

56640629 is a wasteful number, since it uses less digits than its factorization.

56640629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268650.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 56640629 is about 7525.9968774907. The cubic root of 56640629 is about 384.0396122511.

The spelling of 56640629 in words is "fifty-six million, six hundred forty thousand, six hundred twenty-nine".