389418331 has 4 divisors (see below), whose sum is σ = 390446200. Its totient is φ = 388390464.

The previous prime is 389418317. The next prime is 389418347. The reversal of 389418331 is 133814983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133814983 = 53 ⋅2524811.

It is a cyclic number.

It is not a de Polignac number, because 389418331 - 2⁵ = 389418299 is a prime.

It is a super-2 number, since 2×389418331² = 303293273037651122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389418361) 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, 513366 + ... + 514123.

It is an arithmetic number, because the mean of its divisors is an integer number (97611550).

Almost surely, 2^389418331 is an apocalyptic number.

389418331 is a deficient number, since it is larger than the sum of its proper divisors (1027869).

389418331 is a wasteful number, since it uses less digits than its factorization.

389418331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027868.

The product of its digits is 62208, while the sum is 40.

The square root of 389418331 is about 19733.6851854893. The cubic root of 389418331 is about 730.2509495637.

The spelling of 389418331 in words is "three hundred eighty-nine million, four hundred eighteen thousand, three hundred thirty-one".