325691 has 2 divisors, whose sum is σ = 325692. Its totient is φ = 325690.

The previous prime is 325681. The next prime is 325693. The reversal of 325691 is 196523.

325691 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

It is a strong prime.

It is an emirp because it is prime and its reverse (196523) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 325691 - 2⁶ = 325627 is a prime.

Together with 325693, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 325691.

It is not a weakly prime, because it can be changed into another prime (325693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162845 + 162846.

It is an arithmetic number, because the mean of its divisors is an integer number (162846).

2³²⁵⁶⁹¹ is an apocalyptic number.

325691 is a deficient number, since it is larger than the sum of its proper divisors (1).

325691 is an equidigital number, since it uses as much as digits as its factorization.

325691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 26.

The square root of 325691 is about 570.6934378456. The cubic root of 325691 is about 68.8021356602.

The spelling of 325691 in words is "three hundred twenty-five thousand, six hundred ninety-one".