55917893 has 16 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 50822640.

The previous prime is 55917889. The next prime is 55917923. The reversal of 55917893 is 39871955.

It is not a de Polignac number, because 55917893 - 2² = 55917889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55917833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81530 + ... + 82212.

It is an arithmetic number, because the mean of its divisors is an integer number (3830400).

Almost surely, 2^55917893 is an apocalyptic number.

It is an amenable number.

55917893 is a deficient number, since it is larger than the sum of its proper divisors (5368507).

55917893 is a wasteful number, since it uses less digits than its factorization.

55917893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872.

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

The square root of 55917893 is about 7477.8267564848. The cubic root of 55917893 is about 382.3991629045.

The spelling of 55917893 in words is "fifty-five million, nine hundred seventeen thousand, eight hundred ninety-three".