231232489 has 4 divisors (see below), whose sum is σ = 243402640. Its totient is φ = 219062340.

The previous prime is 231232471. The next prime is 231232513. The reversal of 231232489 is 984232132.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231232489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231232429) 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, 6085047 + ... + 6085084.

It is an arithmetic number, because the mean of its divisors is an integer number (60850660).

Almost surely, 2^231232489 is an apocalyptic number.

It is an amenable number.

231232489 is a deficient number, since it is larger than the sum of its proper divisors (12170151).

231232489 is a wasteful number, since it uses less digits than its factorization.

231232489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12170150.

The product of its digits is 20736, while the sum is 34.

The square root of 231232489 is about 15206.3305567122. The cubic root of 231232489 is about 613.7850197165.

The spelling of 231232489 in words is "two hundred thirty-one million, two hundred thirty-two thousand, four hundred eighty-nine".