320829986 has 4 divisors (see below), whose sum is σ = 481244982. Its totient is φ = 160414992.

The previous prime is 320829973. The next prime is 320830007. The reversal of 320829986 is 689928023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689928023 = 2269 ⋅304067.

It can be written as a sum of positive squares in only one way, i.e., 259693225 + 61136761 = 16115^2 + 7819^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 320829986.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80207495 + ... + 80207498.

Almost surely, 2^320829986 is an apocalyptic number.

320829986 is a deficient number, since it is larger than the sum of its proper divisors (160414996).

320829986 is a wasteful number, since it uses less digits than its factorization.

320829986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160414995.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 320829986 is about 17911.7276107024. The cubic root of 320829986 is about 684.5812248443.

The spelling of 320829986 in words is "three hundred twenty million, eight hundred twenty-nine thousand, nine hundred eighty-six".