2789899669 has 4 divisors (see below), whose sum is σ = 2817522540. Its totient is φ = 2762276800.

The previous prime is 2789899661. The next prime is 2789899681. The reversal of 2789899669 is 9669989872.

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 2752261444 + 37638225 = 52462^2 + 6135^2 .

It is a cyclic number.

It is not a de Polignac number, because 2789899669 - 2³ = 2789899661 is a prime.

It is a super-2 number, since 2×2789899669² = 15567080326172619122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2789899661) 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 3 ways as a sum of consecutive naturals, for example, 13811284 + ... + 13811485.

It is an arithmetic number, because the mean of its divisors is an integer number (704380635).

Almost surely, 2^2789899669 is an apocalyptic number.

It is an amenable number.

2789899669 is a deficient number, since it is larger than the sum of its proper divisors (27622871).

2789899669 is a wasteful number, since it uses less digits than its factorization.

2789899669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27622870.

The product of its digits is 211631616, while the sum is 73.

The square root of 2789899669 is about 52819.5008401253. The cubic root of 2789899669 is about 1407.7629414100.

The spelling of 2789899669 in words is "two billion, seven hundred eighty-nine million, eight hundred ninety-nine thousand, six hundred sixty-nine".