56887129 has 8 divisors (see below), whose sum is σ = 61334280. Its totient is φ = 52450176.

The previous prime is 56887123. The next prime is 56887141. The reversal of 56887129 is 92178865.

It can be written as a sum of positive squares in 4 ways, for example, as 291600 + 56595529 = 540^2 + 7523^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 56887129 - 2⁵ = 56887097 is a prime.

It is a super-2 number, since 2×56887129² = 6472290891725282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56887123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12267 + ... + 16255.

It is an arithmetic number, because the mean of its divisors is an integer number (7666785).

Almost surely, 2^56887129 is an apocalyptic number.

It is an amenable number.

56887129 is a deficient number, since it is larger than the sum of its proper divisors (4447151).

56887129 is a wasteful number, since it uses less digits than its factorization.

56887129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5099.

The product of its digits is 241920, while the sum is 46.

The square root of 56887129 is about 7542.3556665010. The cubic root of 56887129 is about 384.5959194385.

The spelling of 56887129 in words is "fifty-six million, eight hundred eighty-seven thousand, one hundred twenty-nine".