231699097 has 6 divisors (see below), whose sum is σ = 269527578. Its totient is φ = 198599184.

The previous prime is 231699071. The next prime is 231699107. The reversal of 231699097 is 790996132.

It can be written as a sum of positive squares in only one way, i.e., 187662601 + 44036496 = 13699^2 + 6636^2 .

It is not a de Polignac number, because 231699097 - 2⁷ = 231698969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231699037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2364228 + ... + 2364325.

It is an arithmetic number, because the mean of its divisors is an integer number (44921263).

Almost surely, 2^231699097 is an apocalyptic number.

It is an amenable number.

231699097 is a deficient number, since it is larger than the sum of its proper divisors (37828481).

231699097 is an equidigital number, since it uses as much as digits as its factorization.

231699097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728567 (or 4728560 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 231699097 is about 15221.6653819482. The cubic root of 231699097 is about 614.1975980924.

The spelling of 231699097 in words is "two hundred thirty-one million, six hundred ninety-nine thousand, ninety-seven".