326785989 has 4 divisors (see below), whose sum is σ = 435714656. Its totient is φ = 217857324.

The previous prime is 326785981. The next prime is 326785993. The reversal of 326785989 is 989587623.

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, and also an emirpimes, since its reverse is a distinct semiprime: 989587623 = 3 ⋅329862541.

It is not a de Polignac number, because 326785989 - 2³ = 326785981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326785981) 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, 54464329 + ... + 54464334.

It is an arithmetic number, because the mean of its divisors is an integer number (108928664).

Almost surely, 2^326785989 is an apocalyptic number.

It is an amenable number.

326785989 is a deficient number, since it is larger than the sum of its proper divisors (108928667).

326785989 is a wasteful number, since it uses less digits than its factorization.

326785989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108928666.

The product of its digits is 6531840, while the sum is 57.

The square root of 326785989 is about 18077.2229338469. Note that the first 3 decimals coincide. The cubic root of 326785989 is about 688.7915478728.

The spelling of 326785989 in words is "three hundred twenty-six million, seven hundred eighty-five thousand, nine hundred eighty-nine".