55713989 has 4 divisors (see below), whose sum is σ = 55729260. Its totient is φ = 55698720.

The previous prime is 55713979. The next prime is 55713991. The reversal of 55713989 is 98931755.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 53904964 + 1809025 = 7342^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 55713989 - 2¹² = 55709893 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 (55713919) 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, 1409 + ... + 10649.

It is an arithmetic number, because the mean of its divisors is an integer number (13932315).

Almost surely, 2^55713989 is an apocalyptic number.

It is an amenable number.

55713989 is a deficient number, since it is larger than the sum of its proper divisors (15271).

55713989 is an equidigital number, since it uses as much as digits as its factorization.

55713989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15270.

The product of its digits is 340200, while the sum is 47.

The square root of 55713989 is about 7464.1803970697. The cubic root of 55713989 is about 381.9337919666.

The spelling of 55713989 in words is "fifty-five million, seven hundred thirteen thousand, nine hundred eighty-nine".