63945969 has 8 divisors (see below), whose sum is σ = 85594080. Its totient is φ = 42464256.

The previous prime is 63945961. The next prime is 63945971. The reversal of 63945969 is 96954936.

It is a happy number.

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

It is not a de Polignac number, because 63945969 - 2³ = 63945961 is a prime.

It is a super-2 number, since 2×63945969² = 8178173902697922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63945961) 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, 40699 + ... + 42240.

It is an arithmetic number, because the mean of its divisors is an integer number (10699260).

Almost surely, 2^63945969 is an apocalyptic number.

It is an amenable number.

63945969 is a deficient number, since it is larger than the sum of its proper divisors (21648111).

63945969 is a wasteful number, since it uses less digits than its factorization.

63945969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83199.

The product of its digits is 1574640, while the sum is 51.

The square root of 63945969 is about 7996.6223494673. The cubic root of 63945969 is about 399.8874037248.

The spelling of 63945969 in words is "sixty-three million, nine hundred forty-five thousand, nine hundred sixty-nine".