326920861 has 4 divisors (see below), whose sum is σ = 333876672. Its totient is φ = 319965052.

The previous prime is 326920843. The next prime is 326920871. The reversal of 326920861 is 168029623.

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 326920861 - 2¹⁷ = 326789789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 326920861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326920871) 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, 3477835 + ... + 3477928.

It is an arithmetic number, because the mean of its divisors is an integer number (83469168).

Almost surely, 2^326920861 is an apocalyptic number.

It is an amenable number.

326920861 is a deficient number, since it is larger than the sum of its proper divisors (6955811).

326920861 is an equidigital number, since it uses as much as digits as its factorization.

326920861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6955810.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 326920861 is about 18080.9529892647. The cubic root of 326920861 is about 688.8862948114.

The spelling of 326920861 in words is "three hundred twenty-six million, nine hundred twenty thousand, eight hundred sixty-one".