55889639 has 4 divisors (see below), whose sum is σ = 60188856. Its totient is φ = 51590424.

The previous prime is 55889633. The next prime is 55889651. The reversal of 55889639 is 93698855.

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 55889639 - 2⁴ = 55889623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55889633) 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, 2149589 + ... + 2149614.

It is an arithmetic number, because the mean of its divisors is an integer number (15047214).

Almost surely, 2^55889639 is an apocalyptic number.

55889639 is a deficient number, since it is larger than the sum of its proper divisors (4299217).

55889639 is a wasteful number, since it uses less digits than its factorization.

55889639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299216.

The product of its digits is 2332800, while the sum is 53.

The square root of 55889639 is about 7475.9373325356. The cubic root of 55889639 is about 382.3347462775.

The spelling of 55889639 in words is "fifty-five million, eight hundred eighty-nine thousand, six hundred thirty-nine".