326980691 has 4 divisors (see below), whose sum is σ = 333150192. Its totient is φ = 320811192.

The previous prime is 326980639. The next prime is 326980697. The reversal of 326980691 is 196089623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196089623 = 6983 ⋅28081.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326980691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (326980697) 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, 3084671 + ... + 3084776.

It is an arithmetic number, because the mean of its divisors is an integer number (83287548).

Almost surely, 2^326980691 is an apocalyptic number.

326980691 is a deficient number, since it is larger than the sum of its proper divisors (6169501).

326980691 is an equidigital number, since it uses as much as digits as its factorization.

326980691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169500.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 326980691 is about 18082.6074170735. The cubic root of 326980691 is about 688.9283167581.

The spelling of 326980691 in words is "three hundred twenty-six million, nine hundred eighty thousand, six hundred ninety-one".