64621373 has 4 divisors (see below), whose sum is σ = 64761408. Its totient is φ = 64481340.

The previous prime is 64621331. The next prime is 64621397. The reversal of 64621373 is 37312646.

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 64621373 - 2¹⁴ = 64604989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64621313) 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, 69323 + ... + 70248.

It is an arithmetic number, because the mean of its divisors is an integer number (16190352).

Almost surely, 2^64621373 is an apocalyptic number.

It is an amenable number.

64621373 is a deficient number, since it is larger than the sum of its proper divisors (140035).

64621373 is a wasteful number, since it uses less digits than its factorization.

64621373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140034.

The product of its digits is 18144, while the sum is 32.

The square root of 64621373 is about 8038.7420035724. The cubic root of 64621373 is about 401.2903600348.

The spelling of 64621373 in words is "sixty-four million, six hundred twenty-one thousand, three hundred seventy-three".