63990722 has 8 divisors (see below), whose sum is σ = 96473916. Its totient is φ = 31832752.

The previous prime is 63990721. The next prime is 63990757. The reversal of 63990722 is 22709936.

63990722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36857041 + 27133681 = 6071^2 + 5209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (63990721) 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 3 ways as a sum of consecutive naturals, for example, 80813 + ... + 81600.

Almost surely, 2^63990722 is an apocalyptic number.

63990722 is a deficient number, since it is larger than the sum of its proper divisors (32483194).

63990722 is a wasteful number, since it uses less digits than its factorization.

63990722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162612.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 63990722 is about 7999.4201039825. The cubic root of 63990722 is about 399.9806698992.

The spelling of 63990722 in words is "sixty-three million, nine hundred ninety thousand, seven hundred twenty-two".