55847639 has 8 divisors (see below), whose sum is σ = 56615328. Its totient is φ = 55085440.

The previous prime is 55847633. The next prime is 55847641. The reversal of 55847639 is 93674855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55847639 - 2⁸ = 55847383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55847593 and 55847602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55847633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21659 + ... + 24099.

It is an arithmetic number, because the mean of its divisors is an integer number (7076916).

Almost surely, 2^55847639 is an apocalyptic number.

55847639 is a deficient number, since it is larger than the sum of its proper divisors (767689).

55847639 is a wasteful number, since it uses less digits than its factorization.

55847639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745.

The product of its digits is 907200, while the sum is 47.

The square root of 55847639 is about 7473.1277922969. The cubic root of 55847639 is about 382.2389498487.

The spelling of 55847639 in words is "fifty-five million, eight hundred forty-seven thousand, six hundred thirty-nine".