56732509 has 2 divisors, whose sum is σ = 56732510. Its totient is φ = 56732508.

The previous prime is 56732483. The next prime is 56732527. The reversal of 56732509 is 90523765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45941284 + 10791225 = 6778^2 + 3285^2 .

It is a cyclic number.

It is not a de Polignac number, because 56732509 - 2¹¹ = 56730461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56732549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28366254 + 28366255.

It is an arithmetic number, because the mean of its divisors is an integer number (28366255).

Almost surely, 2^56732509 is an apocalyptic number.

It is an amenable number.

56732509 is a deficient number, since it is larger than the sum of its proper divisors (1).

56732509 is an equidigital number, since it uses as much as digits as its factorization.

56732509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 56732509 is about 7532.0985787495. The cubic root of 56732509 is about 384.2471575991.

The spelling of 56732509 in words is "fifty-six million, seven hundred thirty-two thousand, five hundred nine".