55973609 has 4 divisors (see below), whose sum is σ = 56809104. Its totient is φ = 55138116.

The previous prime is 55973587. The next prime is 55973611. The reversal of 55973609 is 90637955.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55973609 - 2²⁰ = 54925033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55973609.

It is not an unprimeable number, because it can be changed into a prime (55973629) 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, 417647 + ... + 417780.

It is an arithmetic number, because the mean of its divisors is an integer number (14202276).

Almost surely, 2^55973609 is an apocalyptic number.

It is an amenable number.

55973609 is a deficient number, since it is larger than the sum of its proper divisors (835495).

55973609 is an equidigital number, since it uses as much as digits as its factorization.

55973609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835494.

The product of its (nonzero) digits is 255150, while the sum is 44.

The square root of 55973609 is about 7481.5512428907. The cubic root of 55973609 is about 382.5261269123.

The spelling of 55973609 in words is "fifty-five million, nine hundred seventy-three thousand, six hundred nine".