401513639 has 2 divisors, whose sum is σ = 401513640. Its totient is φ = 401513638.

The previous prime is 401513627. The next prime is 401513653. The reversal of 401513639 is 936315104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401513639 - 2²⁴ = 384736423 is a prime.

It is a super-2 number, since 2×401513639² = 322426404606044642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401513659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200756819 + 200756820.

It is an arithmetic number, because the mean of its divisors is an integer number (200756820).

Almost surely, 2^401513639 is an apocalyptic number.

401513639 is a deficient number, since it is larger than the sum of its proper divisors (1).

401513639 is an equidigital number, since it uses as much as digits as its factorization.

401513639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 401513639 is about 20037.8052440880. The cubic root of 401513639 is about 737.7345121875.

The spelling of 401513639 in words is "four hundred one million, five hundred thirteen thousand, six hundred thirty-nine".