325689781 has 2 divisors, whose sum is σ = 325689782. Its totient is φ = 325689780.

The previous prime is 325689779. The next prime is 325689827. The reversal of 325689781 is 187986523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241802500 + 83887281 = 15550^2 + 9159^2 .

It is a cyclic number.

It is not a de Polignac number, because 325689781 - 2¹ = 325689779 is a prime.

It is a super-2 number, since 2×325689781² = 212147666895655922, which contains 22 as substring.

Together with 325689779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325689761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162844890 + 162844891.

It is an arithmetic number, because the mean of its divisors is an integer number (162844891).

Almost surely, 2^325689781 is an apocalyptic number.

It is an amenable number.

325689781 is a deficient number, since it is larger than the sum of its proper divisors (1).

325689781 is an equidigital number, since it uses as much as digits as its factorization.

325689781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 49.

The square root of 325689781 is about 18046.8773199133. The cubic root of 325689781 is about 688.0204982231.

The spelling of 325689781 in words is "three hundred twenty-five million, six hundred eighty-nine thousand, seven hundred eighty-one".