231946369 has 2 divisors, whose sum is σ = 231946370. Its totient is φ = 231946368.

The previous prime is 231946367. The next prime is 231946397. The reversal of 231946369 is 963649132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217415025 + 14531344 = 14745^2 + 3812^2 .

It is a cyclic number.

It is not a de Polignac number, because 231946369 - 2¹ = 231946367 is a prime.

It is a super-2 number, since 2×231946369² = 107598236184568322, which contains 22 as substring.

Together with 231946367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231946367) 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, 115973184 + 115973185.

It is an arithmetic number, because the mean of its divisors is an integer number (115973185).

Almost surely, 2^231946369 is an apocalyptic number.

It is an amenable number.

231946369 is a deficient number, since it is larger than the sum of its proper divisors (1).

231946369 is an equidigital number, since it uses as much as digits as its factorization.

231946369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 43.

The square root of 231946369 is about 15229.7855861466. The cubic root of 231946369 is about 614.4160133780.

The spelling of 231946369 in words is "two hundred thirty-one million, nine hundred forty-six thousand, three hundred sixty-nine".