55913687 has 4 divisors (see below), whose sum is σ = 56145936. Its totient is φ = 55681440.

The previous prime is 55913681. The next prime is 55913699. The reversal of 55913687 is 78631955.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55913687 - 2¹⁶ = 55848151 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 (55913681) 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, 115763 + ... + 116244.

It is an arithmetic number, because the mean of its divisors is an integer number (14036484).

Almost surely, 2^55913687 is an apocalyptic number.

55913687 is a deficient number, since it is larger than the sum of its proper divisors (232249).

55913687 is a wasteful number, since it uses less digits than its factorization.

55913687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232248.

The product of its digits is 226800, while the sum is 44.

The square root of 55913687 is about 7477.5455197545. The cubic root of 55913687 is about 382.3895749705.

The spelling of 55913687 in words is "fifty-five million, nine hundred thirteen thousand, six hundred eighty-seven".