56043409 has 2 divisors, whose sum is σ = 56043410. Its totient is φ = 56043408.

The previous prime is 56043401. The next prime is 56043431. The reversal of 56043409 is 90434065.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43191184 + 12852225 = 6572^2 + 3585^2 .

It is a cyclic number.

It is not a de Polignac number, because 56043409 - 2³ = 56043401 is a prime.

It is not a weakly prime, because it can be changed into another prime (56043401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28021704 + 28021705.

It is an arithmetic number, because the mean of its divisors is an integer number (28021705).

Almost surely, 2^56043409 is an apocalyptic number.

It is an amenable number.

56043409 is a deficient number, since it is larger than the sum of its proper divisors (1).

56043409 is an equidigital number, since it uses as much as digits as its factorization.

56043409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 56043409 is about 7486.2145975119. The cubic root of 56043409 is about 382.6850662960.

The spelling of 56043409 in words is "fifty-six million, forty-three thousand, four hundred nine".