55554909 has 4 divisors (see below), whose sum is σ = 74073216. Its totient is φ = 37036604.

The previous prime is 55554887. The next prime is 55554911. The reversal of 55554909 is 90945555.

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 55554909 - 2²¹ = 53457757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55554509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9259149 + ... + 9259154.

It is an arithmetic number, because the mean of its divisors is an integer number (18518304).

Almost surely, 2^55554909 is an apocalyptic number.

It is an amenable number.

55554909 is a deficient number, since it is larger than the sum of its proper divisors (18518307).

55554909 is a wasteful number, since it uses less digits than its factorization.

55554909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18518306.

The product of its (nonzero) digits is 202500, while the sum is 42.

The square root of 55554909 is about 7453.5165526079. The cubic root of 55554909 is about 381.5699339360.

The spelling of 55554909 in words is "fifty-five million, five hundred fifty-four thousand, nine hundred nine".