7965992989 has 4 divisors (see below), whose sum is σ = 8096583100. Its totient is φ = 7835402880.

The previous prime is 7965992987. The next prime is 7965993037. The reversal of 7965992989 is 9892995697.

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

It can be written as a sum of positive squares in 2 ways, for example, as 471628089 + 7494364900 = 21717^2 + 86570^2 .

It is a cyclic number.

It is not a de Polignac number, because 7965992989 - 2¹ = 7965992987 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 (7965992987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65294964 + ... + 65295085.

It is an arithmetic number, because the mean of its divisors is an integer number (2024145775).

Almost surely, 2^7965992989 is an apocalyptic number.

It is an amenable number.

7965992989 is a deficient number, since it is larger than the sum of its proper divisors (130590111).

7965992989 is a wasteful number, since it uses less digits than its factorization.

7965992989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130590110.

The product of its digits is 198404640, while the sum is 73.

The square root of 7965992989 is about 89252.4116704977. The cubic root of 7965992989 is about 1997.1620573622.

The spelling of 7965992989 in words is "seven billion, nine hundred sixty-five million, nine hundred ninety-two thousand, nine hundred eighty-nine".