64339997 has 4 divisors (see below), whose sum is σ = 65836320. Its totient is φ = 62843676.

The previous prime is 64339981. The next prime is 64339999. The reversal of 64339997 is 79993346.

It is a happy number.

64339997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64339997 - 2⁴ = 64339981 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 (64339999) 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, 748097 + ... + 748182.

It is an arithmetic number, because the mean of its divisors is an integer number (16459080).

Almost surely, 2^64339997 is an apocalyptic number.

It is an amenable number.

64339997 is a deficient number, since it is larger than the sum of its proper divisors (1496323).

64339997 is a wasteful number, since it uses less digits than its factorization.

64339997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496322.

The product of its digits is 1102248, while the sum is 50.

The square root of 64339997 is about 8021.2216650583. The cubic root of 64339997 is about 400.7070764541.

The spelling of 64339997 in words is "sixty-four million, three hundred thirty-nine thousand, nine hundred ninety-seven".