231987693 has 8 divisors (see below), whose sum is σ = 353505088. Its totient is φ = 132564384.

The previous prime is 231987677. The next prime is 231987713. The reversal of 231987693 is 396789132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231987693 - 2⁴ = 231987677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231987293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5523496 + ... + 5523537.

It is an arithmetic number, because the mean of its divisors is an integer number (44188136).

Almost surely, 2^231987693 is an apocalyptic number.

It is an amenable number.

231987693 is a deficient number, since it is larger than the sum of its proper divisors (121517395).

231987693 is a wasteful number, since it uses less digits than its factorization.

231987693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11047043.

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

The square root of 231987693 is about 15231.1422093026. The cubic root of 231987693 is about 614.4524997142.

The spelling of 231987693 in words is "two hundred thirty-one million, nine hundred eighty-seven thousand, six hundred ninety-three".