55804609 has 4 divisors (see below), whose sum is σ = 63776704. Its totient is φ = 47832516.

The previous prime is 55804597. The next prime is 55804627. The reversal of 55804609 is 90640855.

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 55804609 - 2⁷ = 55804481 is a prime.

It is a super-2 number, since 2×55804609² = 6228308771285762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55804109) 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, 3986037 + ... + 3986050.

It is an arithmetic number, because the mean of its divisors is an integer number (15944176).

Almost surely, 2^55804609 is an apocalyptic number.

It is an amenable number.

55804609 is a deficient number, since it is larger than the sum of its proper divisors (7972095).

55804609 is an equidigital number, since it uses as much as digits as its factorization.

55804609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7972094.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 55804609 is about 7470.2482555803. The cubic root of 55804609 is about 382.1407543034.

The spelling of 55804609 in words is "fifty-five million, eight hundred four thousand, six hundred nine".