55492409 has 4 divisors (see below), whose sum is σ = 63419904. Its totient is φ = 47564916.

The previous prime is 55492397. The next prime is 55492427. The reversal of 55492409 is 90429455.

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 not a de Polignac number, because 55492409 - 2¹² = 55488313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55492429) 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, 3963737 + ... + 3963750.

It is an arithmetic number, because the mean of its divisors is an integer number (15854976).

Almost surely, 2^55492409 is an apocalyptic number.

It is an amenable number.

55492409 is a deficient number, since it is larger than the sum of its proper divisors (7927495).

55492409 is an equidigital number, since it uses as much as digits as its factorization.

55492409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7927494.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 55492409 is about 7449.3227208921. The cubic root of 55492409 is about 381.4267898524.

The spelling of 55492409 in words is "fifty-five million, four hundred ninety-two thousand, four hundred nine".