56402539 has 2 divisors, whose sum is σ = 56402540. Its totient is φ = 56402538.

The previous prime is 56402537. The next prime is 56402551. The reversal of 56402539 is 93520465.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56402539 - 2¹ = 56402537 is a prime.

Together with 56402537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56402531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28201269 + 28201270.

It is an arithmetic number, because the mean of its divisors is an integer number (28201270).

Almost surely, 2^56402539 is an apocalyptic number.

56402539 is a deficient number, since it is larger than the sum of its proper divisors (1).

56402539 is an equidigital number, since it uses as much as digits as its factorization.

56402539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 56402539 is about 7510.1623817332. The cubic root of 56402539 is about 383.5007504800.

The spelling of 56402539 in words is "fifty-six million, four hundred two thousand, five hundred thirty-nine".