389264935921 has 9 divisors (see below), whose sum is σ = 394063803211. Its totient is φ = 384523836232.

The previous prime is 389264935907. The next prime is 389264935931. The reversal of 389264935921 is 129539462983.

The square root of 389264935921 is 623911.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 364604630625 + 24660305296 = 603825^2 + 157036^2 .

It is not a de Polignac number, because 389264935921 - 2¹⁹ = 389264411633 is a prime.

It is a super-2 number, since 2×389264935921² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 389264935921.

It is not an unprimeable number, because it can be changed into a prime (389264935931) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 51780855 + ... + 51788371.

Almost surely, 2^389264935921 is an apocalyptic number.

389264935921 is the 623911-st square number.

389264935921 is the 311956-th centered octagonal number.

It is an amenable number.

389264935921 is a deficient number, since it is larger than the sum of its proper divisors (4798867290).

389264935921 is an frugal number, since it uses more digits than its factorization.

389264935921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15200 (or 7600 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 61.

The spelling of 389264935921 in words is "three hundred eighty-nine billion, two hundred sixty-four million, nine hundred thirty-five thousand, nine hundred twenty-one".