63977315 has 4 divisors (see below), whose sum is σ = 76772784. Its totient is φ = 51181848.

The previous prime is 63977311. The next prime is 63977321. The reversal of 63977315 is 51377936.

63977315 is nontrivially palindromic in base 15.

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

It is a cyclic number.

It is not a de Polignac number, because 63977315 - 2² = 63977311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63977311) 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, 6397727 + ... + 6397736.

It is an arithmetic number, because the mean of its divisors is an integer number (19193196).

Almost surely, 2^63977315 is an apocalyptic number.

63977315 is a deficient number, since it is larger than the sum of its proper divisors (12795469).

63977315 is a wasteful number, since it uses less digits than its factorization.

63977315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12795468.

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

The square root of 63977315 is about 7998.5820618407. The cubic root of 63977315 is about 399.9527339984.

The spelling of 63977315 in words is "sixty-three million, nine hundred seventy-seven thousand, three hundred fifteen".