231123397 has 2 divisors, whose sum is σ = 231123398. Its totient is φ = 231123396.

The previous prime is 231123371. The next prime is 231123413. The reversal of 231123397 is 793321132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144744961 + 86378436 = 12031^2 + 9294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231123397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231123337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115561698 + 115561699.

It is an arithmetic number, because the mean of its divisors is an integer number (115561699).

Almost surely, 2^231123397 is an apocalyptic number.

It is an amenable number.

231123397 is a deficient number, since it is larger than the sum of its proper divisors (1).

231123397 is an equidigital number, since it uses as much as digits as its factorization.

231123397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 31.

The square root of 231123397 is about 15202.7430748533. The cubic root of 231123397 is about 613.6884796952.

The spelling of 231123397 in words is "two hundred thirty-one million, one hundred twenty-three thousand, three hundred ninety-seven".