64421383 has 16 divisors (see below), whose sum is σ = 72485280. Its totient is φ = 56843136.

The previous prime is 64421359. The next prime is 64421389. The reversal of 64421383 is 38312446.

It is a cyclic number.

It is not a de Polignac number, because 64421383 - 2²¹ = 62324231 is a prime.

It is a super-2 number, since 2×64421383² = 8300229175265378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64421389) 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, 39541 + ... + 41137.

It is an arithmetic number, because the mean of its divisors is an integer number (4530330).

Almost surely, 2^64421383 is an apocalyptic number.

64421383 is a deficient number, since it is larger than the sum of its proper divisors (8063897).

64421383 is a wasteful number, since it uses less digits than its factorization.

64421383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746.

The product of its digits is 13824, while the sum is 31.

The square root of 64421383 is about 8026.2932291314. The cubic root of 64421383 is about 400.8759615780.

The spelling of 64421383 in words is "sixty-four million, four hundred twenty-one thousand, three hundred eighty-three".