63901513 has 4 divisors (see below), whose sum is σ = 68817028. Its totient is φ = 58986000.

The previous prime is 63901511. The next prime is 63901531. The reversal of 63901513 is 31510936.

63901513 = 5652² + 5653².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31945104 + 31956409 = 5652^2 + 5653^2 .

It is a cyclic number.

It is not a de Polignac number, because 63901513 - 2¹ = 63901511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63901511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2457738 + ... + 2457763.

It is an arithmetic number, because the mean of its divisors is an integer number (17204257).

Almost surely, 2^63901513 is an apocalyptic number.

63901513 is the 5653-rd centered square number.

It is an amenable number.

63901513 is a deficient number, since it is larger than the sum of its proper divisors (4915515).

63901513 is a wasteful number, since it uses less digits than its factorization.

63901513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4915514.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 63901513 is about 7993.8421925880. The cubic root of 63901513 is about 399.7947134116.

The spelling of 63901513 in words is "sixty-three million, nine hundred one thousand, five hundred thirteen".