402538013 has 2 divisors, whose sum is σ = 402538014. Its totient is φ = 402538012.

The previous prime is 402538001. The next prime is 402538043. The reversal of 402538013 is 310835204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321771844 + 80766169 = 17938^2 + 8987^2 .

It is a cyclic number.

It is not a de Polignac number, because 402538013 - 2⁴ = 402537997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402538043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201269006 + 201269007.

It is an arithmetic number, because the mean of its divisors is an integer number (201269007).

Almost surely, 2^402538013 is an apocalyptic number.

It is an amenable number.

402538013 is a deficient number, since it is larger than the sum of its proper divisors (1).

402538013 is an equidigital number, since it uses as much as digits as its factorization.

402538013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 402538013 is about 20063.3499944551. The cubic root of 402538013 is about 738.3613686693.

The spelling of 402538013 in words is "four hundred two million, five hundred thirty-eight thousand, thirteen".