63969750 has 160 divisors (see below), whose sum is σ = 193441248. Its totient is φ = 15746400.

The previous prime is 63969733. The next prime is 63969757. The reversal of 63969750 is 5796936.

63969750 is a `hidden beast` number, since 639 + 6 + 9 + 7 + 5 + 0 = 666.

63969750 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 63969696 and 63969705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63969757) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 4920744 + ... + 4920756.

Almost surely, 2^63969750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63969750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96720624).

63969750 is an abundant number, since it is smaller than the sum of its proper divisors (129471498).

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

63969750 is an frugal number, since it uses more digits than its factorization.

63969750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 63969750 is about 7998.1091515433. The cubic root of 63969750 is about 399.9369692350.

The spelling of 63969750 in words is "sixty-three million, nine hundred sixty-nine thousand, seven hundred fifty".