63975919 has 12 divisors (see below), whose sum is σ = 74861064. Its totient is φ = 54512304.

The previous prime is 63975917. The next prime is 63975931. The reversal of 63975919 is 91957936.

It is not a de Polignac number, because 63975919 - 2¹ = 63975917 is a prime.

It is a super-2 number, since 2×63975919² = 8185836423789122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63975911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4704 + ... + 12250.

It is an arithmetic number, because the mean of its divisors is an integer number (6238422).

Almost surely, 2^63975919 is an apocalyptic number.

63975919 is a deficient number, since it is larger than the sum of its proper divisors (10885145).

63975919 is a wasteful number, since it uses less digits than its factorization.

63975919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7734 (or 7727 counting only the distinct ones).

The product of its digits is 459270, while the sum is 49.

The square root of 63975919 is about 7998.4947958975. The cubic root of 63975919 is about 399.9498249564.

The spelling of 63975919 in words is "sixty-three million, nine hundred seventy-five thousand, nine hundred nineteen".