231352489 has 2 divisors, whose sum is σ = 231352490. Its totient is φ = 231352488.

The previous prime is 231352487. The next prime is 231352501. The reversal of 231352489 is 984253132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219276864 + 12075625 = 14808^2 + 3475^2 .

It is a cyclic number.

It is not a de Polignac number, because 231352489 - 2¹ = 231352487 is a prime.

Together with 231352487, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231352487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115676244 + 115676245.

It is an arithmetic number, because the mean of its divisors is an integer number (115676245).

Almost surely, 2^231352489 is an apocalyptic number.

It is an amenable number.

231352489 is a deficient number, since it is larger than the sum of its proper divisors (1).

231352489 is an equidigital number, since it uses as much as digits as its factorization.

231352489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 231352489 is about 15210.2757700181. The cubic root of 231352489 is about 613.8911776144.

The spelling of 231352489 in words is "two hundred thirty-one million, three hundred fifty-two thousand, four hundred eighty-nine".