64721192 has 16 divisors (see below), whose sum is σ = 124175040. Its totient is φ = 31607856.

The previous prime is 64721191. The next prime is 64721207. The reversal of 64721192 is 29112746.

It is a happy number.

64721192 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64721191) 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, 93728 + ... + 94415.

It is an arithmetic number, because the mean of its divisors is an integer number (7760940).

Almost surely, 2^64721192 is an apocalyptic number.

It is an amenable number.

64721192 is a deficient number, since it is larger than the sum of its proper divisors (59453848).

64721192 is a wasteful number, since it uses less digits than its factorization.

64721192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188192 (or 188188 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 64721192 is about 8044.9482285469. The cubic root of 64721192 is about 401.4968747608.

The spelling of 64721192 in words is "sixty-four million, seven hundred twenty-one thousand, one hundred ninety-two".