56961623 has 4 divisors (see below), whose sum is σ = 56978880. Its totient is φ = 56944368.

The previous prime is 56961613. The next prime is 56961629. The reversal of 56961623 is 32616965.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56961623 - 2¹⁶ = 56896087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56961629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958 + ... + 10851.

It is an arithmetic number, because the mean of its divisors is an integer number (14244720).

Almost surely, 2^56961623 is an apocalyptic number.

56961623 is a deficient number, since it is larger than the sum of its proper divisors (17257).

56961623 is a wasteful number, since it uses less digits than its factorization.

56961623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17256.

The product of its digits is 58320, while the sum is 38.

The square root of 56961623 is about 7547.2924284143. The cubic root of 56961623 is about 384.7637230184.

The spelling of 56961623 in words is "fifty-six million, nine hundred sixty-one thousand, six hundred twenty-three".