56623499 has 4 divisors (see below), whose sum is σ = 56711664. Its totient is φ = 56535336.

The previous prime is 56623417. The next prime is 56623507. The reversal of 56623499 is 99432665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99432665 = 5 ⋅19886533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56623499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56623409) 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, 43112 + ... + 44405.

It is an arithmetic number, because the mean of its divisors is an integer number (14177916).

Almost surely, 2^56623499 is an apocalyptic number.

56623499 is a deficient number, since it is larger than the sum of its proper divisors (88165).

56623499 is an equidigital number, since it uses as much as digits as its factorization.

56623499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88164.

The product of its digits is 349920, while the sum is 44.

The square root of 56623499 is about 7524.8587362156. The cubic root of 56623499 is about 384.0008929197. Note that the first 3 decimals are identical.

The spelling of 56623499 in words is "fifty-six million, six hundred twenty-three thousand, four hundred ninety-nine".