55869979 has 8 divisors (see below), whose sum is σ = 63051120. Its totient is φ = 49039200.

The previous prime is 55869977. The next prime is 55869997. The reversal of 55869979 is 97996855.

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 55869979 - 2¹ = 55869977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55869977) 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 7 ways as a sum of consecutive naturals, for example, 87252 + ... + 87889.

It is an arithmetic number, because the mean of its divisors is an integer number (7881390).

Almost surely, 2^55869979 is an apocalyptic number.

55869979 is a deficient number, since it is larger than the sum of its proper divisors (7181141).

55869979 is a wasteful number, since it uses less digits than its factorization.

55869979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175181.

The product of its digits is 6123600, while the sum is 58.

The square root of 55869979 is about 7474.6223315964. The cubic root of 55869979 is about 382.2899104022.

The spelling of 55869979 in words is "fifty-five million, eight hundred sixty-nine thousand, nine hundred seventy-nine".