325806781 has 2 divisors, whose sum is σ = 325806782. Its totient is φ = 325806780.

The previous prime is 325806779. The next prime is 325806797. The reversal of 325806781 is 187608523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270898681 + 54908100 = 16459^2 + 7410^2 .

It is an emirp because it is prime and its reverse (187608523) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 325806781 - 2¹ = 325806779 is a prime.

It is a super-2 number, since 2×325806781² = 212300117091163922, which contains 22 as substring.

Together with 325806779, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_17571559 and since 325806781 and 17571559 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325806731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162903390 + 162903391.

It is an arithmetic number, because the mean of its divisors is an integer number (162903391).

Almost surely, 2^325806781 is an apocalyptic number.

It is an amenable number.

325806781 is a deficient number, since it is larger than the sum of its proper divisors (1).

325806781 is an equidigital number, since it uses as much as digits as its factorization.

325806781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 325806781 is about 18050.1185868681. The cubic root of 325806781 is about 688.1028759596.

The spelling of 325806781 in words is "three hundred twenty-five million, eight hundred six thousand, seven hundred eighty-one".