55064609 has 2 divisors, whose sum is σ = 55064610. Its totient is φ = 55064608.

The previous prime is 55064593. The next prime is 55064623. The reversal of 55064609 is 90646055.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 15626209 = 6280^2 + 3953^2 .

It is a cyclic number.

It is not a de Polignac number, because 55064609 - 2⁴ = 55064593 is a prime.

It is a super-2 number, since 2×55064609² = 6064222328645762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55064809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27532304 + 27532305.

It is an arithmetic number, because the mean of its divisors is an integer number (27532305).

Almost surely, 2^55064609 is an apocalyptic number.

It is an amenable number.

55064609 is a deficient number, since it is larger than the sum of its proper divisors (1).

55064609 is an equidigital number, since it uses as much as digits as its factorization.

55064609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 55064609 is about 7420.5531464979. The cubic root of 55064609 is about 380.4440998990. Note that the first 3 decimals are identical.

The spelling of 55064609 in words is "fifty-five million, sixty-four thousand, six hundred nine".