56736439 has 2 divisors, whose sum is σ = 56736440. Its totient is φ = 56736438.

The previous prime is 56736437. The next prime is 56736443. The reversal of 56736439 is 93463765.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56736439 - 2¹ = 56736437 is a prime.

Together with 56736437, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 56736395 and 56736404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56736431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28368219 + 28368220.

It is an arithmetic number, because the mean of its divisors is an integer number (28368220).

Almost surely, 2^56736439 is an apocalyptic number.

56736439 is a deficient number, since it is larger than the sum of its proper divisors (1).

56736439 is an equidigital number, since it uses as much as digits as its factorization.

56736439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 43.

The square root of 56736439 is about 7532.3594576998. The cubic root of 56736439 is about 384.2560299752.

It can be divided in two parts, 56736 and 439, that added together give a palindrome (57175).

The spelling of 56736439 in words is "fifty-six million, seven hundred thirty-six thousand, four hundred thirty-nine".