331369 has 2 divisors, whose sum is σ = 331370. Its totient is φ = 331368.

The previous prime is 331367. The next prime is 331391. The reversal of 331369 is 963133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316969 + 14400 = 563^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 331369 - 2¹ = 331367 is a prime.

It is a super-2 number, since 2×331369² = 219610828322, which contains 22 as substring.

Together with 331367, it forms a pair of twin primes.

331369 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (331367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165684 + 165685.

It is an arithmetic number, because the mean of its divisors is an integer number (165685).

2³³¹³⁶⁹ is an apocalyptic number.

It is an amenable number.

331369 is a deficient number, since it is larger than the sum of its proper divisors (1).

331369 is an equidigital number, since it uses as much as digits as its factorization.

331369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 25.

The square root of 331369 is about 575.6465929718. The cubic root of 331369 is about 69.1996597486.

The spelling of 331369 in words is "three hundred thirty-one thousand, three hundred sixty-nine".