64000397 has 4 divisors (see below), whose sum is σ = 64036896. Its totient is φ = 63963900.

The previous prime is 64000381. The next prime is 64000411. The reversal of 64000397 is 79300046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64000397 - 2⁴ = 64000381 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 (64000357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15479 + ... + 19172.

It is an arithmetic number, because the mean of its divisors is an integer number (16009224).

Almost surely, 2^64000397 is an apocalyptic number.

It is an amenable number.

64000397 is a deficient number, since it is larger than the sum of its proper divisors (36499).

64000397 is a wasteful number, since it uses less digits than its factorization.

64000397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36498.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 64000397 is about 8000.0248124615. The cubic root of 64000397 is about 400.0008270816. Note that the first 3 decimals are identical.

It can be divided in two parts, 6400039 and 7, that added together give a palindrome (6400046).

The spelling of 64000397 in words is "sixty-four million, three hundred ninety-seven", and thus it is an aban number.