55087879 has 16 divisors (see below), whose sum is σ = 68843520. Its totient is φ = 42824160.

The previous prime is 55087873. The next prime is 55087883. The reversal of 55087879 is 97878055.

It is a cyclic number.

It is not a de Polignac number, because 55087879 - 2¹⁵ = 55055111 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 (55087873) 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 15 ways as a sum of consecutive naturals, for example, 63402 + ... + 64264.

It is an arithmetic number, because the mean of its divisors is an integer number (4302720).

Almost surely, 2^55087879 is an apocalyptic number.

55087879 is a deficient number, since it is larger than the sum of its proper divisors (13755641).

55087879 is a wasteful number, since it uses less digits than its factorization.

55087879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710.

The product of its (nonzero) digits is 705600, while the sum is 49.

The square root of 55087879 is about 7422.1209232941. The cubic root of 55087879 is about 380.4976835443.

The spelling of 55087879 in words is "fifty-five million, eighty-seven thousand, eight hundred seventy-nine".