325809681 has 4 divisors (see below), whose sum is σ = 434412912. Its totient is φ = 217206452.

The previous prime is 325809643. The next prime is 325809683. The reversal of 325809681 is 186908523.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 325809681 - 2¹¹ = 325807633 is a prime.

It is a super-2 number, since 2×325809681² = 212303896466643522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (325809683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54301611 + ... + 54301616.

It is an arithmetic number, because the mean of its divisors is an integer number (108603228).

Almost surely, 2^325809681 is an apocalyptic number.

It is an amenable number.

325809681 is a deficient number, since it is larger than the sum of its proper divisors (108603231).

325809681 is a wasteful number, since it uses less digits than its factorization.

325809681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108603230.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 325809681 is about 18050.1989185715. The cubic root of 325809681 is about 688.1049175504.

The spelling of 325809681 in words is "three hundred twenty-five million, eight hundred nine thousand, six hundred eighty-one".