63997900 has 36 divisors (see below), whose sum is σ = 140650720. Its totient is φ = 25272000.

The previous prime is 63997873. The next prime is 63997951. The reversal of 63997900 is 979936.

63997900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3850 + ... + 11950.

Almost surely, 2^63997900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63997900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70325360).

63997900 is an abundant number, since it is smaller than the sum of its proper divisors (76652820).

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

63997900 is a wasteful number, since it uses less digits than its factorization.

63997900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8194 (or 8187 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 63997900 is about 7999.8687489233. The cubic root of 63997900 is about 399.9956249521.

It can be divided in two parts, 6399 and 7900, that multiplied together give a square (50552100 = 7110²).

The spelling of 63997900 in words is "sixty-three million, nine hundred ninety-seven thousand, nine hundred".