63709980 has 48 divisors (see below), whose sum is σ = 178827264. Its totient is φ = 16947520.

The previous prime is 63709979. The next prime is 63709981. The reversal of 63709980 is 8990736.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (63709979) and next prime (63709981).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63709981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29125 + ... + 31235.

It is an arithmetic number, because the mean of its divisors is an integer number (3725568).

Almost surely, 2^63709980 is an apocalyptic number.

63709980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63709980 is an abundant number, since it is smaller than the sum of its proper divisors (115117284).

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

63709980 is a wasteful number, since it uses less digits than its factorization.

63709980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 63709980 is about 7981.8531682812. The cubic root of 63709980 is about 399.3948766928.

The spelling of 63709980 in words is "sixty-three million, seven hundred nine thousand, nine hundred eighty".