55074809 has 2 divisors, whose sum is σ = 55074810. Its totient is φ = 55074808.

The previous prime is 55074797. The next prime is 55074827. The reversal of 55074809 is 90847055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54804409 + 270400 = 7403^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 55074809 - 2¹² = 55070713 is a prime.

It is not a weakly prime, because it can be changed into another prime (55074829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27537404 + 27537405.

It is an arithmetic number, because the mean of its divisors is an integer number (27537405).

Almost surely, 2^55074809 is an apocalyptic number.

It is an amenable number.

55074809 is a deficient number, since it is larger than the sum of its proper divisors (1).

55074809 is an equidigital number, since it uses as much as digits as its factorization.

55074809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 55074809 is about 7421.2403949744. The cubic root of 55074809 is about 380.4675892164.

The spelling of 55074809 in words is "fifty-five million, seventy-four thousand, eight hundred nine".