56447539 has 2 divisors, whose sum is σ = 56447540. Its totient is φ = 56447538.

The previous prime is 56447527. The next prime is 56447549. The reversal of 56447539 is 93574465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56447539 - 2⁷ = 56447411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56447495 and 56447504.

It is not a weakly prime, because it can be changed into another prime (56447549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28223769 + 28223770.

It is an arithmetic number, because the mean of its divisors is an integer number (28223770).

Almost surely, 2^56447539 is an apocalyptic number.

56447539 is a deficient number, since it is larger than the sum of its proper divisors (1).

56447539 is an equidigital number, since it uses as much as digits as its factorization.

56447539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 43.

The square root of 56447539 is about 7513.1577249516. The cubic root of 56447539 is about 383.6027136572.

The spelling of 56447539 in words is "fifty-six million, four hundred forty-seven thousand, five hundred thirty-nine".