7169978989 has 4 divisors (see below), whose sum is σ = 7176815100. Its totient is φ = 7163142880.

The previous prime is 7169978983. The next prime is 7169979001. The reversal of 7169978989 is 9898799617.

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 5847202089 + 1322776900 = 76467^2 + 36370^2 .

It is a cyclic number.

It is not a de Polignac number, because 7169978989 - 2⁵ = 7169978957 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 (7169978983) 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, 3416482 + ... + 3418579.

It is an arithmetic number, because the mean of its divisors is an integer number (1794203775).

Almost surely, 2^7169978989 is an apocalyptic number.

It is an amenable number.

7169978989 is a deficient number, since it is larger than the sum of its proper divisors (6836111).

7169978989 is a wasteful number, since it uses less digits than its factorization.

7169978989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6836110.

The product of its digits is 123451776, while the sum is 73.

The square root of 7169978989 is about 84675.7284527272. The cubic root of 7169978989 is about 1928.2912371643.

The spelling of 7169978989 in words is "seven billion, one hundred sixty-nine million, nine hundred seventy-eight thousand, nine hundred eighty-nine".