231207689 has 4 divisors (see below), whose sum is σ = 236584656. Its totient is φ = 225830724.

The previous prime is 231207653. The next prime is 231207719. The reversal of 231207689 is 986702132.

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 not a de Polignac number, because 231207689 - 2⁸ = 231207433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231207649) 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, 2688419 + ... + 2688504.

It is an arithmetic number, because the mean of its divisors is an integer number (59146164).

Almost surely, 2^231207689 is an apocalyptic number.

It is an amenable number.

231207689 is a deficient number, since it is larger than the sum of its proper divisors (5376967).

231207689 is an equidigital number, since it uses as much as digits as its factorization.

231207689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5376966.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 231207689 is about 15205.5150849947. The cubic root of 231207689 is about 613.7630758383.

The spelling of 231207689 in words is "two hundred thirty-one million, two hundred seven thousand, six hundred eighty-nine".