320998819 has 4 divisors (see below), whose sum is σ = 321083280. Its totient is φ = 320914360.

The previous prime is 320998813. The next prime is 320998829. The reversal of 320998819 is 918899023.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320998819 is a prime.

It is a super-2 number, since 2×320998819² = 206080483598789522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320998813) 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, 36247 + ... + 44224.

It is an arithmetic number, because the mean of its divisors is an integer number (80270820).

Almost surely, 2^320998819 is an apocalyptic number.

320998819 is a deficient number, since it is larger than the sum of its proper divisors (84461).

320998819 is an equidigital number, since it uses as much as digits as its factorization.

320998819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84460.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 320998819 is about 17916.4399086426. The cubic root of 320998819 is about 684.7012880540.

The spelling of 320998819 in words is "three hundred twenty million, nine hundred ninety-eight thousand, eight hundred nineteen".