1989793113 has 64 divisors (see below), whose sum is σ = 3406233600. Its totient is φ = 1003325760.

The previous prime is 1989793109. The next prime is 1989793139. The reversal of 1989793113 is 3113979891.

It is not a de Polignac number, because 1989793113 - 2² = 1989793109 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1989793163) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1130328 + ... + 1132086.

It is an arithmetic number, because the mean of its divisors is an integer number (53222400).

Almost surely, 2^1989793113 is an apocalyptic number.

It is an amenable number.

1989793113 is a deficient number, since it is larger than the sum of its proper divisors (1416440487).

1989793113 is a wasteful number, since it uses less digits than its factorization.

1989793113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922.

The product of its digits is 367416, while the sum is 51.

The square root of 1989793113 is about 44607.0971146969. The cubic root of 1989793113 is about 1257.7740814673.

The spelling of 1989793113 in words is "one billion, nine hundred eighty-nine million, seven hundred ninety-three thousand, one hundred thirteen".