231873689 has 2 divisors, whose sum is σ = 231873690. Its totient is φ = 231873688.

The previous prime is 231873617. The next prime is 231873713. The reversal of 231873689 is 986378132.

231873689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210018064 + 21855625 = 14492^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 231873689 - 2¹² = 231869593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (231872689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115936844 + 115936845.

It is an arithmetic number, because the mean of its divisors is an integer number (115936845).

Almost surely, 2^231873689 is an apocalyptic number.

It is an amenable number.

231873689 is a deficient number, since it is larger than the sum of its proper divisors (1).

231873689 is an equidigital number, since it uses as much as digits as its factorization.

231873689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 231873689 is about 15227.3992854985. The cubic root of 231873689 is about 614.3518312697.

The spelling of 231873689 in words is "two hundred thirty-one million, eight hundred seventy-three thousand, six hundred eighty-nine".