7973898989 has 16 divisors (see below), whose sum is σ = 9243525888. Its totient is φ = 6737012352.

The previous prime is 7973898979. The next prime is 7973898991. The reversal of 7973898989 is 9898983797.

It is a happy number.

It is not a de Polignac number, because 7973898989 - 2²⁴ = 7957121773 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 (7973898979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1062719 + ... + 1070195.

It is an arithmetic number, because the mean of its divisors is an integer number (577720368).

Almost surely, 2^7973898989 is an apocalyptic number.

It is an amenable number.

7973898989 is a deficient number, since it is larger than the sum of its proper divisors (1269626899).

7973898989 is a wasteful number, since it uses less digits than its factorization.

7973898989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9644.

The product of its digits is 493807104, while the sum is 77.

The square root of 7973898989 is about 89296.6908065467. The cubic root of 7973898989 is about 1997.8225459573.

The spelling of 7973898989 in words is "seven billion, nine hundred seventy-three million, eight hundred ninety-eight thousand, nine hundred eighty-nine".