63634970 has 16 divisors (see below), whose sum is σ = 130906368. Its totient is φ = 21817680.

The previous prime is 63634943. The next prime is 63634973. The reversal of 63634970 is 7943636.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (63634973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454466 + ... + 454605.

It is an arithmetic number, because the mean of its divisors is an integer number (8181648).

Almost surely, 2^63634970 is an apocalyptic number.

63634970 is an abundant number, since it is smaller than the sum of its proper divisors (67271398).

63634970 is a wasteful number, since it uses less digits than its factorization.

63634970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909085.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 63634970 is about 7977.1530009145. The cubic root of 63634970 is about 399.2380704131.

The spelling of 63634970 in words is "sixty-three million, six hundred thirty-four thousand, nine hundred seventy".