55909379 has 4 divisors (see below), whose sum is σ = 59198184. Its totient is φ = 52620576.

The previous prime is 55909369. The next prime is 55909387. The reversal of 55909379 is 97390955.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55909379 - 2²⁰ = 54860803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55909309) 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, 1644377 + ... + 1644410.

It is an arithmetic number, because the mean of its divisors is an integer number (14799546).

Almost surely, 2^55909379 is an apocalyptic number.

55909379 is a deficient number, since it is larger than the sum of its proper divisors (3288805).

55909379 is a wasteful number, since it uses less digits than its factorization.

55909379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3288804.

The product of its (nonzero) digits is 382725, while the sum is 47.

The square root of 55909379 is about 7477.2574517667. The cubic root of 55909379 is about 382.3797540204.

The spelling of 55909379 in words is "fifty-five million, nine hundred nine thousand, three hundred seventy-nine".