63709425 has 72 divisors (see below), whose sum is σ = 128366784. Its totient is φ = 29969280.

The previous prime is 63709417. The next prime is 63709463. The reversal of 63709425 is 52490736.

It is not a de Polignac number, because 63709425 - 2³ = 63709417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63709425.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 66802 + ... + 67748.

It is an arithmetic number, because the mean of its divisors is an integer number (1782872).

Almost surely, 2^63709425 is an apocalyptic number.

63709425 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

63709425 is an abundant number, since it is smaller than the sum of its proper divisors (64657359).

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

63709425 is a wasteful number, since it uses less digits than its factorization.

63709425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 63709425 is about 7981.8184018430. The cubic root of 63709425 is about 399.3937169331.

The spelling of 63709425 in words is "sixty-three million, seven hundred nine thousand, four hundred twenty-five".