64421313 has 16 divisors (see below), whose sum is σ = 99216576. Its totient is φ = 36746240.

The previous prime is 64421311. The next prime is 64421323. The reversal of 64421313 is 31312446.

It is a cyclic number.

It is not a de Polignac number, because 64421313 - 2¹ = 64421311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64421311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56856 + ... + 57977.

It is an arithmetic number, because the mean of its divisors is an integer number (6201036).

Almost surely, 2^64421313 is an apocalyptic number.

It is an amenable number.

64421313 is a deficient number, since it is larger than the sum of its proper divisors (34795263).

64421313 is a wasteful number, since it uses less digits than its factorization.

64421313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114864.

The product of its digits is 1728, while the sum is 24.

The square root of 64421313 is about 8026.2888684622. The cubic root of 64421313 is about 400.8758163813.

Adding to 64421313 its reverse (31312446), we get a palindrome (95733759).

The spelling of 64421313 in words is "sixty-four million, four hundred twenty-one thousand, three hundred thirteen".