231681697 has 8 divisors (see below), whose sum is σ = 250455744. Its totient is φ = 213043728.

The previous prime is 231681689. The next prime is 231681701. The reversal of 231681697 is 796186132.

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 231681697 - 2³ = 231681689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231681607) 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, 30463 + ... + 37300.

It is an arithmetic number, because the mean of its divisors is an integer number (31306968).

Almost surely, 2^231681697 is an apocalyptic number.

It is an amenable number.

231681697 is a deficient number, since it is larger than the sum of its proper divisors (18774047).

231681697 is a wasteful number, since it uses less digits than its factorization.

231681697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68039.

The product of its digits is 108864, while the sum is 43.

The square root of 231681697 is about 15221.0938174627. The cubic root of 231681697 is about 614.1822228265.

The spelling of 231681697 in words is "two hundred thirty-one million, six hundred eighty-one thousand, six hundred ninety-seven".