231369893 has 2 divisors, whose sum is σ = 231369894. Its totient is φ = 231369892.

The previous prime is 231369883. The next prime is 231369911. The reversal of 231369893 is 398963132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197065444 + 34304449 = 14038^2 + 5857^2 .

It is a cyclic number.

It is not a de Polignac number, because 231369893 - 2⁴ = 231369877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231369823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115684946 + 115684947.

It is an arithmetic number, because the mean of its divisors is an integer number (115684947).

Almost surely, 2^231369893 is an apocalyptic number.

It is an amenable number.

231369893 is a deficient number, since it is larger than the sum of its proper divisors (1).

231369893 is an equidigital number, since it uses as much as digits as its factorization.

231369893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 231369893 is about 15210.8478724889. The cubic root of 231369893 is about 613.9065709999.

The spelling of 231369893 in words is "two hundred thirty-one million, three hundred sixty-nine thousand, eight hundred ninety-three".