63797513 has 4 divisors (see below), whose sum is σ = 68705028. Its totient is φ = 58890000.

The previous prime is 63797483. The next prime is 63797537. The reversal of 63797513 is 31579736.

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 26245129 + 37552384 = 5123^2 + 6128^2 .

It is not a de Polignac number, because 63797513 - 2¹⁰ = 63796489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63797543) 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, 2453738 + ... + 2453763.

It is an arithmetic number, because the mean of its divisors is an integer number (17176257).

Almost surely, 2^63797513 is an apocalyptic number.

It is an amenable number.

63797513 is a deficient number, since it is larger than the sum of its proper divisors (4907515).

63797513 is a wasteful number, since it uses less digits than its factorization.

63797513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907514.

The product of its digits is 119070, while the sum is 41.

The square root of 63797513 is about 7987.3345366273. The cubic root of 63797513 is about 399.5777064105.

The spelling of 63797513 in words is "sixty-three million, seven hundred ninety-seven thousand, five hundred thirteen".