63406971 has 12 divisors (see below), whose sum is σ = 96408520. Its totient is φ = 40046400.

The previous prime is 63406969. The next prime is 63407039. The reversal of 63406971 is 17960436.

It is not a de Polignac number, because 63406971 - 2¹ = 63406969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63406961) 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, 185230 + ... + 185571.

Almost surely, 2^63406971 is an apocalyptic number.

63406971 is a deficient number, since it is larger than the sum of its proper divisors (33001549).

63406971 is a wasteful number, since it uses less digits than its factorization.

63406971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370826 (or 370823 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 63406971 is about 7962.8494271837. The cubic root of 63406971 is about 398.7606871413.

The spelling of 63406971 in words is "sixty-three million, four hundred six thousand, nine hundred seventy-one".