55088639 has 2 divisors, whose sum is σ = 55088640. Its totient is φ = 55088638.

The previous prime is 55088557. The next prime is 55088641. The reversal of 55088639 is 93688055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55088639 - 2²⁴ = 38311423 is a prime.

Together with 55088641, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55088639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55088689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27544319 + 27544320.

It is an arithmetic number, because the mean of its divisors is an integer number (27544320).

Almost surely, 2^55088639 is an apocalyptic number.

55088639 is a deficient number, since it is larger than the sum of its proper divisors (1).

55088639 is an equidigital number, since it uses as much as digits as its factorization.

55088639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 55088639 is about 7422.1721214211. The cubic root of 55088639 is about 380.4994333358.

The spelling of 55088639 in words is "fifty-five million, eighty-eight thousand, six hundred thirty-nine".