63939954 has 64 divisors (see below), whose sum is σ = 148780800. Its totient is φ = 18154752.

The previous prime is 63939947. The next prime is 63939961. The reversal of 63939954 is 45993936.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (63939947) and next prime (63939961).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51412 + ... + 52640.

It is an arithmetic number, because the mean of its divisors is an integer number (2324700).

Almost surely, 2^63939954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63939954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74390400).

63939954 is an abundant number, since it is smaller than the sum of its proper divisors (84840846).

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

63939954 is a wasteful number, since it uses less digits than its factorization.

63939954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299.

The product of its digits is 787320, while the sum is 48.

The square root of 63939954 is about 7996.2462443324. The cubic root of 63939954 is about 399.8748650238.

The spelling of 63939954 in words is "sixty-three million, nine hundred thirty-nine thousand, nine hundred fifty-four".