231489917 has 8 divisors (see below), whose sum is σ = 242615040. Its totient is φ = 220453200.

The previous prime is 231489913. The next prime is 231489943. The reversal of 231489917 is 719984132.

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

It is a cyclic number.

It is not a de Polignac number, because 231489917 - 2² = 231489913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231489911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16709 + ... + 27242.

It is an arithmetic number, because the mean of its divisors is an integer number (30326880).

Almost surely, 2^231489917 is an apocalyptic number.

It is an amenable number.

231489917 is a deficient number, since it is larger than the sum of its proper divisors (11125123).

231489917 is a wasteful number, since it uses less digits than its factorization.

231489917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44203.

The product of its digits is 108864, while the sum is 44.

The square root of 231489917 is about 15214.7927031557. The cubic root of 231489917 is about 614.0127080946.

The spelling of 231489917 in words is "two hundred thirty-one million, four hundred eighty-nine thousand, nine hundred seventeen".