7889007969 has 6 divisors (see below), whose sum is σ = 11395233746. Its totient is φ = 5259338640.

The previous prime is 7889007911. The next prime is 7889007979. The reversal of 7889007969 is 9697009887.

It can be written as a sum of positive squares in only one way, i.e., 4326350625 + 3562657344 = 65775^2 + 59688^2 .

It is not a de Polignac number, because 7889007969 - 2⁹ = 7889007457 is a prime.

It is a super-2 number, since 2×7889007969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7889007979) 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 5 ways as a sum of consecutive naturals, for example, 438278212 + ... + 438278229.

Almost surely, 2^7889007969 is an apocalyptic number.

It is an amenable number.

7889007969 is a deficient number, since it is larger than the sum of its proper divisors (3506225777).

7889007969 is a wasteful number, since it uses less digits than its factorization.

7889007969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876556447 (or 876556444 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The square root of 7889007969 is about 88820.0876435055. The cubic root of 7889007969 is about 1990.7075561939.

The spelling of 7889007969 in words is "seven billion, eight hundred eighty-nine million, seven thousand, nine hundred sixty-nine".