63897609 has 8 divisors (see below), whose sum is σ = 85303872. Its totient is φ = 42544880.

The previous prime is 63897601. The next prime is 63897619. The reversal of 63897609 is 90679836.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63897609 - 2³ = 63897601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63897601) 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, 10509 + ... + 15434.

It is an arithmetic number, because the mean of its divisors is an integer number (10662984).

Almost surely, 2^63897609 is an apocalyptic number.

It is an amenable number.

63897609 is a deficient number, since it is larger than the sum of its proper divisors (21406263).

63897609 is a wasteful number, since it uses less digits than its factorization.

63897609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26767.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 63897609 is about 7993.5980009005. The cubic root of 63897609 is about 399.7865715577.

The spelling of 63897609 in words is "sixty-three million, eight hundred ninety-seven thousand, six hundred nine".