325807921 has 4 divisors (see below), whose sum is σ = 329033844. Its totient is φ = 322582000.

The previous prime is 325807919. The next prime is 325807931. The reversal of 325807921 is 129708523.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 257249521 + 68558400 = 16039^2 + 8280^2 .

It is a cyclic number.

It is not a de Polignac number, because 325807921 - 2¹ = 325807919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (325807931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1612810 + ... + 1613011.

It is an arithmetic number, because the mean of its divisors is an integer number (82258461).

Almost surely, 2^325807921 is an apocalyptic number.

It is an amenable number.

325807921 is a deficient number, since it is larger than the sum of its proper divisors (3225923).

325807921 is a wasteful number, since it uses less digits than its factorization.

325807921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225922.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 325807921 is about 18050.1501655803. The cubic root of 325807921 is about 688.1036785174.

The spelling of 325807921 in words is "three hundred twenty-five million, eight hundred seven thousand, nine hundred twenty-one".