56634691 has 4 divisors (see below), whose sum is σ = 56751472. Its totient is φ = 56517912.

The previous prime is 56634689. The next prime is 56634703. The reversal of 56634691 is 19643665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19643665 = 5 ⋅3928733.

It is a cyclic number.

It is not a de Polignac number, because 56634691 - 2¹ = 56634689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56634601) 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, 57660 + ... + 58633.

It is an arithmetic number, because the mean of its divisors is an integer number (14187868).

Almost surely, 2^56634691 is an apocalyptic number.

56634691 is a deficient number, since it is larger than the sum of its proper divisors (116781).

56634691 is a wasteful number, since it uses less digits than its factorization.

56634691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116780.

The product of its digits is 116640, while the sum is 40.

The square root of 56634691 is about 7525.6023679171. The cubic root of 56634691 is about 384.0261913378.

The spelling of 56634691 in words is "fifty-six million, six hundred thirty-four thousand, six hundred ninety-one".