325967991 has 4 divisors (see below), whose sum is σ = 434623992. Its totient is φ = 217311992.

The previous prime is 325967987. The next prime is 325968001. The reversal of 325967991 is 199769523.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199769523 = 3 ⋅66589841.

It is a cyclic number.

It is not a de Polignac number, because 325967991 - 2² = 325967987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325967981) 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, 54327996 + ... + 54328001.

It is an arithmetic number, because the mean of its divisors is an integer number (108655998).

Almost surely, 2^325967991 is an apocalyptic number.

325967991 is a deficient number, since it is larger than the sum of its proper divisors (108656001).

325967991 is a wasteful number, since it uses less digits than its factorization.

325967991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108656000.

The product of its digits is 918540, while the sum is 51.

The square root of 325967991 is about 18054.5836562353. The cubic root of 325967991 is about 688.2163489136.

The spelling of 325967991 in words is "three hundred twenty-five million, nine hundred sixty-seven thousand, nine hundred ninety-one".