4791989917 has 16 divisors (see below), whose sum is σ = 5781912192. Its totient is φ = 3912563520.

The previous prime is 4791989897. The next prime is 4791989927. The reversal of 4791989917 is 7199891974.

4791989917 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4791989917 - 2²³ = 4783601309 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 (4791989927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447553 + ... + 458134.

It is an arithmetic number, because the mean of its divisors is an integer number (361369512).

Almost surely, 2^4791989917 is an apocalyptic number.

It is an amenable number.

4791989917 is a deficient number, since it is larger than the sum of its proper divisors (989922275).

4791989917 is a wasteful number, since it uses less digits than its factorization.

4791989917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905748.

The product of its digits is 10287648, while the sum is 64.

The square root of 4791989917 is about 69224.2003709685. The cubic root of 4791989917 is about 1685.9264796053.

The spelling of 4791989917 in words is "four billion, seven hundred ninety-one million, nine hundred eighty-nine thousand, nine hundred seventeen".