56658729 has 16 divisors (see below), whose sum is σ = 80963712. Its totient is φ = 35152128.

The previous prime is 56658727. The next prime is 56658757. The reversal of 56658729 is 92785665.

It is a happy number.

It is not a de Polignac number, because 56658729 - 2¹ = 56658727 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56658727) 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 15 ways as a sum of consecutive naturals, for example, 8544 + ... + 13649.

It is an arithmetic number, because the mean of its divisors is an integer number (5060232).

Almost surely, 2^56658729 is an apocalyptic number.

It is an amenable number.

56658729 is a deficient number, since it is larger than the sum of its proper divisors (24304983).

56658729 is a wasteful number, since it uses less digits than its factorization.

56658729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22256.

The product of its digits is 907200, while the sum is 48.

The square root of 56658729 is about 7527.1992799447. The cubic root of 56658729 is about 384.0805156145.

It can be divided in two parts, 566 and 58729, that added together give a palindrome (59295).

The spelling of 56658729 in words is "fifty-six million, six hundred fifty-eight thousand, seven hundred twenty-nine".