321879982 has 4 divisors (see below), whose sum is σ = 482819976. Its totient is φ = 160939990.

The previous prime is 321879967. The next prime is 321880001. The reversal of 321879982 is 289978123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 289978123 = 31 ⋅9354133.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80469994 + ... + 80469997.

It is an arithmetic number, because the mean of its divisors is an integer number (120704994).

Almost surely, 2^321879982 is an apocalyptic number.

321879982 is a deficient number, since it is larger than the sum of its proper divisors (160939994).

321879982 is a wasteful number, since it uses less digits than its factorization.

321879982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160939993.

The product of its digits is 435456, while the sum is 49.

The square root of 321879982 is about 17941.0139624270. The cubic root of 321879982 is about 685.3272324318.

The spelling of 321879982 in words is "three hundred twenty-one million, eight hundred seventy-nine thousand, nine hundred eighty-two".