56729987 has 8 divisors (see below), whose sum is σ = 58280256. Its totient is φ = 55194112.

The previous prime is 56729963. The next prime is 56729993. The reversal of 56729987 is 78992765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56729987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56729927) 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 7 ways as a sum of consecutive naturals, for example, 4643 + ... + 11619.

It is an arithmetic number, because the mean of its divisors is an integer number (7285032).

Almost surely, 2^56729987 is an apocalyptic number.

56729987 is a deficient number, since it is larger than the sum of its proper divisors (1550269).

56729987 is a wasteful number, since it uses less digits than its factorization.

56729987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7197.

The product of its digits is 1905120, while the sum is 53.

The square root of 56729987 is about 7531.9311600678. The cubic root of 56729987 is about 384.2414637109.

The spelling of 56729987 in words is "fifty-six million, seven hundred twenty-nine thousand, nine hundred eighty-seven".