231693789 has 32 divisors (see below), whose sum is σ = 337478400. Its totient is φ = 140940800.

The previous prime is 231693769. The next prime is 231693797. The reversal of 231693789 is 987396132.

It is a cyclic number.

It is not a de Polignac number, because 231693789 - 2²⁴ = 214916573 is a prime.

It is a super-2 number, since 2×231693789² = 107364023722353042, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231693739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177439 + ... + 178739.

It is an arithmetic number, because the mean of its divisors is an integer number (10546200).

Almost surely, 2^231693789 is an apocalyptic number.

231693789 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

231693789 is a deficient number, since it is larger than the sum of its proper divisors (105784611).

231693789 is a wasteful number, since it uses less digits than its factorization.

231693789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445.

The product of its digits is 489888, while the sum is 48.

The square root of 231693789 is about 15221.4910242065. The cubic root of 231693789 is about 614.1929078343.

The spelling of 231693789 in words is "two hundred thirty-one million, six hundred ninety-three thousand, seven hundred eighty-nine".