320231986 has 4 divisors (see below), whose sum is σ = 480347982. Its totient is φ = 160115992.

The previous prime is 320231981. The next prime is 320231993. The reversal of 320231986 is 689132023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689132023 = 53 ⋅13002491.

It can be written as a sum of positive squares in only one way, i.e., 320231025 + 961 = 17895^2 + 31^2 .

It is not an unprimeable number, because it can be changed into a prime (320231981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80057995 + ... + 80057998.

Almost surely, 2^320231986 is an apocalyptic number.

320231986 is a deficient number, since it is larger than the sum of its proper divisors (160115996).

320231986 is a wasteful number, since it uses less digits than its factorization.

320231986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160115995.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 320231986 is about 17895.0268510556. The cubic root of 320231986 is about 684.1556264446.

The spelling of 320231986 in words is "three hundred twenty million, two hundred thirty-one thousand, nine hundred eighty-six".