55839507 has 4 divisors (see below), whose sum is σ = 74452680. Its totient is φ = 37226336.

The previous prime is 55839481. The next prime is 55839517. The reversal of 55839507 is 70593855.

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 55839507 - 2¹⁸ = 55577363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55839517) 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 3 ways as a sum of consecutive naturals, for example, 9306582 + ... + 9306587.

It is an arithmetic number, because the mean of its divisors is an integer number (18613170).

Almost surely, 2^55839507 is an apocalyptic number.

55839507 is a deficient number, since it is larger than the sum of its proper divisors (18613173).

55839507 is a wasteful number, since it uses less digits than its factorization.

55839507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18613172.

The product of its (nonzero) digits is 189000, while the sum is 42.

The square root of 55839507 is about 7472.5836897287. The cubic root of 55839507 is about 382.2203962859.

The spelling of 55839507 in words is "fifty-five million, eight hundred thirty-nine thousand, five hundred seven".