231040689 has 8 divisors (see below), whose sum is σ = 336059232. Its totient is φ = 140024640.

The previous prime is 231040669. The next prime is 231040697. The reversal of 231040689 is 986040132.

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

It is not a de Polignac number, because 231040689 - 2¹³ = 231032497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 7001233 = 231040689 / (2 + 3 + 1 + 0 + 4 + 0 + 6 + 8 + 9).

It is not an unprimeable number, because it can be changed into a prime (231040669) 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, 3500584 + ... + 3500649.

It is an arithmetic number, because the mean of its divisors is an integer number (42007404).

Almost surely, 2^231040689 is an apocalyptic number.

It is an amenable number.

231040689 is a deficient number, since it is larger than the sum of its proper divisors (105018543).

231040689 is a wasteful number, since it uses less digits than its factorization.

231040689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7001247.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 231040689 is about 15200.0226644568. The cubic root of 231040689 is about 613.6152677182.

The spelling of 231040689 in words is "two hundred thirty-one million, forty thousand, six hundred eighty-nine".