389956269 has 4 divisors (see below), whose sum is σ = 519941696. Its totient is φ = 259970844.

The previous prime is 389956267. The next prime is 389956277. The reversal of 389956269 is 962659983.

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 not a de Polignac number, because 389956269 - 2¹ = 389956267 is a prime.

It is a super-2 number, since 2×389956269² = 304131783464800722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389956267) 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, 64992709 + ... + 64992714.

It is an arithmetic number, because the mean of its divisors is an integer number (129985424).

Almost surely, 2^389956269 is an apocalyptic number.

It is an amenable number.

389956269 is a deficient number, since it is larger than the sum of its proper divisors (129985427).

389956269 is a wasteful number, since it uses less digits than its factorization.

389956269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129985426.

The product of its digits is 6298560, while the sum is 57.

The square root of 389956269 is about 19747.3104244603. The cubic root of 389956269 is about 730.5870482689.

The spelling of 389956269 in words is "three hundred eighty-nine million, nine hundred fifty-six thousand, two hundred sixty-nine".