64397223 has 12 divisors (see below), whose sum is σ = 101474568. Its totient is φ = 39028560.

The previous prime is 64397189. The next prime is 64397243. The reversal of 64397223 is 32279346.

It is a happy number.

64397223 is a `hidden beast` number, since 643 + 9 + 7 + 2 + 2 + 3 = 666.

It is not a de Polignac number, because 64397223 - 2⁶ = 64397159 is a prime.

It is a super-2 number, since 2×64397223² = 8294004660223458, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64397243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325140 + ... + 325337.

It is an arithmetic number, because the mean of its divisors is an integer number (8456214).

Almost surely, 2^64397223 is an apocalyptic number.

64397223 is a deficient number, since it is larger than the sum of its proper divisors (37077345).

64397223 is a wasteful number, since it uses less digits than its factorization.

64397223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650494 (or 650491 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 64397223 is about 8024.7880345838. The cubic root of 64397223 is about 400.8258417069.

It can be divided in two parts, 64397 and 223, that added together give a triangular number (64620 = T₃₅₉).

The spelling of 64397223 in words is "sixty-four million, three hundred ninety-seven thousand, two hundred twenty-three".