389969253 has 24 divisors (see below), whose sum is σ = 571273560. Its totient is φ = 256312320.

The previous prime is 389969249. The next prime is 389969257. The reversal of 389969253 is 352969983.

389969253 is a `hidden beast` number, since 389 + 9 + 6 + 9 + 253 = 666.

It is an interprime number because it is at equal distance from previous prime (389969249) and next prime (389969257).

It can be written as a sum of positive squares in 4 ways, for example, as 10771524 + 379197729 = 3282^2 + 19473^2 .

It is not a de Polignac number, because 389969253 - 2² = 389969249 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 389969253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389969257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474583 + ... + 475403.

It is an arithmetic number, because the mean of its divisors is an integer number (23803065).

Almost surely, 2^389969253 is an apocalyptic number.

It is an amenable number.

389969253 is a deficient number, since it is larger than the sum of its proper divisors (181304307).

389969253 is a wasteful number, since it uses less digits than its factorization.

389969253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509 (or 1506 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 389969253 is about 19747.6391753546. The cubic root of 389969253 is about 730.5951567310.

The spelling of 389969253 in words is "three hundred eighty-nine million, nine hundred sixty-nine thousand, two hundred fifty-three".