56436013 has 2 divisors, whose sum is σ = 56436014. Its totient is φ = 56436012.

The previous prime is 56436011. The next prime is 56436067. The reversal of 56436013 is 31063465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42797764 + 13638249 = 6542^2 + 3693^2 .

It is a cyclic number.

It is not a de Polignac number, because 56436013 - 2¹ = 56436011 is a prime.

Together with 56436011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56436011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28218006 + 28218007.

It is an arithmetic number, because the mean of its divisors is an integer number (28218007).

Almost surely, 2^56436013 is an apocalyptic number.

It is an amenable number.

56436013 is a deficient number, since it is larger than the sum of its proper divisors (1).

56436013 is an equidigital number, since it uses as much as digits as its factorization.

56436013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 56436013 is about 7512.3906314834. The cubic root of 56436013 is about 383.5766026527.

Adding to 56436013 its reverse (31063465), we get a palindrome (87499478).

The spelling of 56436013 in words is "fifty-six million, four hundred thirty-six thousand, thirteen".