56450909 has 2 divisors, whose sum is σ = 56450910. Its totient is φ = 56450908.

The previous prime is 56450879. The next prime is 56450921. The reversal of 56450909 is 90905465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53611684 + 2839225 = 7322^2 + 1685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56450909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56450929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28225454 + 28225455.

It is an arithmetic number, because the mean of its divisors is an integer number (28225455).

Almost surely, 2^56450909 is an apocalyptic number.

It is an amenable number.

56450909 is a deficient number, since it is larger than the sum of its proper divisors (1).

56450909 is an equidigital number, since it uses as much as digits as its factorization.

56450909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 56450909 is about 7513.3819948143. The cubic root of 56450909 is about 383.6103473849.

The spelling of 56450909 in words is "fifty-six million, four hundred fifty thousand, nine hundred nine".