63867975 has 12 divisors (see below), whose sum is σ = 105595176. Its totient is φ = 34062880.

The previous prime is 63867959. The next prime is 63867977. The reversal of 63867975 is 57976836.

It is not a de Polignac number, because 63867975 - 2⁴ = 63867959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63867977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 425712 + ... + 425861.

It is an arithmetic number, because the mean of its divisors is an integer number (8799598).

Almost surely, 2^63867975 is an apocalyptic number.

63867975 is a deficient number, since it is larger than the sum of its proper divisors (41727201).

63867975 is a wasteful number, since it uses less digits than its factorization.

63867975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851586 (or 851581 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 51.

The square root of 63867975 is about 7991.7441775873. The cubic root of 63867975 is about 399.7247585655.

The spelling of 63867975 in words is "sixty-three million, eight hundred sixty-seven thousand, nine hundred seventy-five".