56393509 has 2 divisors, whose sum is σ = 56393510. Its totient is φ = 56393508.

The previous prime is 56393503. The next prime is 56393527. The reversal of 56393509 is 90539365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35736484 + 20657025 = 5978^2 + 4545^2 .

It is a cyclic number.

It is not a de Polignac number, because 56393509 - 2¹³ = 56385317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56393503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28196754 + 28196755.

It is an arithmetic number, because the mean of its divisors is an integer number (28196755).

Almost surely, 2^56393509 is an apocalyptic number.

It is an amenable number.

56393509 is a deficient number, since it is larger than the sum of its proper divisors (1).

56393509 is an equidigital number, since it uses as much as digits as its factorization.

56393509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109350, while the sum is 40.

The square root of 56393509 is about 7509.5611722657. The cubic root of 56393509 is about 383.4802833364.

The spelling of 56393509 in words is "fifty-six million, three hundred ninety-three thousand, five hundred nine".