64344013 has 4 divisors (see below), whose sum is σ = 67730560. Its totient is φ = 60957468.

The previous prime is 64344001. The next prime is 64344017. The reversal of 64344013 is 31044346.

It is a happy number.

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 64344013 - 2⁹ = 64343501 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 (64344017) 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, 1693245 + ... + 1693282.

It is an arithmetic number, because the mean of its divisors is an integer number (16932640).

Almost surely, 2^64344013 is an apocalyptic number.

It is an amenable number.

64344013 is a deficient number, since it is larger than the sum of its proper divisors (3386547).

64344013 is a wasteful number, since it uses less digits than its factorization.

64344013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386546.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 64344013 is about 8021.4719970838. The cubic root of 64344013 is about 400.7154134462.

Adding to 64344013 its reverse (31044346), we get a palindrome (95388359).

The spelling of 64344013 in words is "sixty-four million, three hundred forty-four thousand, thirteen".