231708689279 has 4 divisors (see below), whose sum is σ = 231941096184. Its totient is φ = 231476282376.

The previous prime is 231708689269. The next prime is 231708689299. The reversal of 231708689279 is 972986807132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231708689279 - 2²⁸ = 231440253823 is a prime.

It is a super-3 number, since 3×231708689279³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231708689269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116201957 + ... + 116203950.

It is an arithmetic number, because the mean of its divisors is an integer number (57985274046).

Almost surely, 2^231708689279 is an apocalyptic number.

231708689279 is a deficient number, since it is larger than the sum of its proper divisors (232406905).

231708689279 is an equidigital number, since it uses as much as digits as its factorization.

231708689279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232406904.

The product of its (nonzero) digits is 18289152, while the sum is 62.

The spelling of 231708689279 in words is "two hundred thirty-one billion, seven hundred eight million, six hundred eighty-nine thousand, two hundred seventy-nine".