63877967 has 4 divisors (see below), whose sum is σ = 63895440. Its totient is φ = 63860496.

The previous prime is 63877963. The next prime is 63877987. The reversal of 63877967 is 76977836.

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 63877967 - 2² = 63877963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63877963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923 + ... + 11340.

It is an arithmetic number, because the mean of its divisors is an integer number (15973860).

Almost surely, 2^63877967 is an apocalyptic number.

63877967 is a deficient number, since it is larger than the sum of its proper divisors (17473).

63877967 is a wasteful number, since it uses less digits than its factorization.

63877967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17472.

The product of its digits is 2667168, while the sum is 53.

The square root of 63877967 is about 7992.3692982744. The cubic root of 63877967 is about 399.7456028228.

The spelling of 63877967 in words is "sixty-three million, eight hundred seventy-seven thousand, nine hundred sixty-seven".