1980831863 has 4 divisors (see below), whose sum is σ = 2049136440. Its totient is φ = 1912527288.

The previous prime is 1980831817. The next prime is 1980831883. The reversal of 1980831863 is 3681380891.

It is a happy number.

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 1980831863 - 2¹⁴ = 1980815479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980831883) 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, 34152245 + ... + 34152302.

It is an arithmetic number, because the mean of its divisors is an integer number (512284110).

Almost surely, 2^1980831863 is an apocalyptic number.

1980831863 is a deficient number, since it is larger than the sum of its proper divisors (68304577).

1980831863 is an equidigital number, since it uses as much as digits as its factorization.

1980831863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68304576.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1980831863 is about 44506.5373063329. The cubic root of 1980831863 is about 1255.8830656330.

The spelling of 1980831863 in words is "one billion, nine hundred eighty million, eight hundred thirty-one thousand, eight hundred sixty-three".