63940889 has 4 divisors (see below), whose sum is σ = 64262400. Its totient is φ = 63619380.

The previous prime is 63940883. The next prime is 63940901. The reversal of 63940889 is 98804936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63940889 - 2⁴ = 63940873 is a prime.

It is a super-2 number, since 2×63940889² = 8176874572220642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63940883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160457 + ... + 160854.

It is an arithmetic number, because the mean of its divisors is an integer number (16065600).

Almost surely, 2^63940889 is an apocalyptic number.

It is an amenable number.

63940889 is a deficient number, since it is larger than the sum of its proper divisors (321511).

63940889 is a wasteful number, since it uses less digits than its factorization.

63940889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321510.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 63940889 is about 7996.3047090516. The cubic root of 63940889 is about 399.8768141503.

The spelling of 63940889 in words is "sixty-three million, nine hundred forty thousand, eight hundred eighty-nine".