231393329 has 2 divisors, whose sum is σ = 231393330. Its totient is φ = 231393328.

The previous prime is 231393319. The next prime is 231393353. The reversal of 231393329 is 923393132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173633329 + 57760000 = 13177^2 + 7600^2 .

It is a cyclic number.

It is not a de Polignac number, because 231393329 - 2²⁰ = 230344753 is a prime.

It is not a weakly prime, because it can be changed into another prime (231393319) 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, 115696664 + 115696665.

It is an arithmetic number, because the mean of its divisors is an integer number (115696665).

Almost surely, 2^231393329 is an apocalyptic number.

It is an amenable number.

231393329 is a deficient number, since it is larger than the sum of its proper divisors (1).

231393329 is an equidigital number, since it uses as much as digits as its factorization.

231393329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 35.

The square root of 231393329 is about 15211.6182242390. The cubic root of 231393329 is about 613.9272983130.

The spelling of 231393329 in words is "two hundred thirty-one million, three hundred ninety-three thousand, three hundred twenty-nine".