864283621 has 8 divisors (see below), whose sum is σ = 926709120. Its totient is φ = 803145408.

The previous prime is 864283613. The next prime is 864283633. The reversal of 864283621 is 126382468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 864283621 - 2³ = 864283613 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 (864283601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320431 + ... + 323116.

It is an arithmetic number, because the mean of its divisors is an integer number (115838640).

Almost surely, 2^864283621 is an apocalyptic number.

It is an amenable number.

864283621 is a deficient number, since it is larger than the sum of its proper divisors (62425499).

864283621 is a wasteful number, since it uses less digits than its factorization.

864283621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643643.

The product of its digits is 110592, while the sum is 40.

The square root of 864283621 is about 29398.7010087181. The cubic root of 864283621 is about 952.5448374353.

The spelling of 864283621 in words is "eight hundred sixty-four million, two hundred eighty-three thousand, six hundred twenty-one".