63997386 has 16 divisors (see below), whose sum is σ = 128781984. Its totient is φ = 21201264.

The previous prime is 63997343. The next prime is 63997387. The reversal of 63997386 is 68379936.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (63997387) 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, 31741 + ... + 33696.

It is an arithmetic number, because the mean of its divisors is an integer number (8048874).

Almost surely, 2^63997386 is an apocalyptic number.

63997386 is an abundant number, since it is smaller than the sum of its proper divisors (64784598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63997386 is a wasteful number, since it uses less digits than its factorization.

63997386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65605.

The product of its digits is 1469664, while the sum is 51.

The square root of 63997386 is about 7999.8366233318. The cubic root of 63997386 is about 399.9945540925.

The spelling of 63997386 in words is "sixty-three million, nine hundred ninety-seven thousand, three hundred eighty-six".