319987060891 has 4 divisors (see below), whose sum is σ = 328635359872. Its totient is φ = 311338761912.

The previous prime is 319987060873. The next prime is 319987060919. The reversal of 319987060891 is 198060789913.

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

It is a cyclic number.

It is not a de Polignac number, because 319987060891 - 2¹⁷ = 319986929819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319987060801) 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, 4324149435 + ... + 4324149508.

It is an arithmetic number, because the mean of its divisors is an integer number (82158839968).

Almost surely, 2^319987060891 is an apocalyptic number.

319987060891 is a deficient number, since it is larger than the sum of its proper divisors (8648298981).

319987060891 is an equidigital number, since it uses as much as digits as its factorization.

319987060891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8648298980.

The product of its (nonzero) digits is 5878656, while the sum is 61.

The spelling of 319987060891 in words is "three hundred nineteen billion, nine hundred eighty-seven million, sixty thousand, eight hundred ninety-one".