319691 has 2 divisors, whose sum is σ = 319692. Its totient is φ = 319690.

The previous prime is 319687. The next prime is 319699. The reversal of 319691 is 196913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 319691 - 2² = 319687 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (319699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159845 + 159846.

It is an arithmetic number, because the mean of its divisors is an integer number (159846).

2³¹⁹⁶⁹¹ is an apocalyptic number.

319691 is a deficient number, since it is larger than the sum of its proper divisors (1).

319691 is an equidigital number, since it uses as much as digits as its factorization.

319691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 29.

The square root of 319691 is about 565.4122389903. The cubic root of 319691 is about 68.3770148366.

The spelling of 319691 in words is "three hundred nineteen thousand, six hundred ninety-one".