64397213 has 8 divisors (see below), whose sum is σ = 68742720. Its totient is φ = 60147360.

The previous prime is 64397189. The next prime is 64397243. The reversal of 64397213 is 31279346.

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

It is a cyclic number.

It is not a de Polignac number, because 64397213 - 2⁶ = 64397149 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 22520 + ... + 25217.

It is an arithmetic number, because the mean of its divisors is an integer number (8592840).

Almost surely, 2^64397213 is an apocalyptic number.

It is an amenable number.

64397213 is a deficient number, since it is larger than the sum of its proper divisors (4345507).

64397213 is a wasteful number, since it uses less digits than its factorization.

64397213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47827.

The product of its digits is 27216, while the sum is 35.

The square root of 64397213 is about 8024.7874115144. The cubic root of 64397213 is about 400.8258209594.

The spelling of 64397213 in words is "sixty-four million, three hundred ninety-seven thousand, two hundred thirteen".