389523621 has 8 divisors (see below), whose sum is σ = 537274080. Its totient is φ = 250727792.

The previous prime is 389523611. The next prime is 389523643. The reversal of 389523621 is 126325983.

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 389523621 - 2¹⁵ = 389490853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389523621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389523611) 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, 2238555 + ... + 2238728.

It is an arithmetic number, because the mean of its divisors is an integer number (67159260).

Almost surely, 2^389523621 is an apocalyptic number.

It is an amenable number.

389523621 is a deficient number, since it is larger than the sum of its proper divisors (147750459).

389523621 is a wasteful number, since it uses less digits than its factorization.

389523621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477315.

The product of its digits is 77760, while the sum is 39.

The square root of 389523621 is about 19736.3527785657. The cubic root of 389523621 is about 730.3167581366.

The spelling of 389523621 in words is "three hundred eighty-nine million, five hundred twenty-three thousand, six hundred twenty-one".