231401369 has 2 divisors, whose sum is σ = 231401370. Its totient is φ = 231401368.

The previous prime is 231401341. The next prime is 231401371. The reversal of 231401369 is 963104132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226111369 + 5290000 = 15037^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 231401369 - 2⁸ = 231401113 is a prime.

It is a super-2 number, since 2×231401369² = 107093187150148322, which contains 22 as substring.

Together with 231401371, 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 (231407369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115700684 + 115700685.

It is an arithmetic number, because the mean of its divisors is an integer number (115700685).

Almost surely, 2^231401369 is an apocalyptic number.

It is an amenable number.

231401369 is a deficient number, since it is larger than the sum of its proper divisors (1).

231401369 is an equidigital number, since it uses as much as digits as its factorization.

231401369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 231401369 is about 15211.8824936298. The cubic root of 231401369 is about 613.9344087432.

The spelling of 231401369 in words is "two hundred thirty-one million, four hundred one thousand, three hundred sixty-nine".