2879889809 has 2 divisors, whose sum is σ = 2879889810. Its totient is φ = 2879889808.

The previous prime is 2879889707. The next prime is 2879889827. The reversal of 2879889809 is 9089889782.

2879889809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2879395600 + 494209 = 53660^2 + 703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2879889809 is a prime.

It is not a weakly prime, because it can be changed into another prime (2879889839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1439944904 + 1439944905.

It is an arithmetic number, because the mean of its divisors is an integer number (1439944905).

Almost surely, 2^2879889809 is an apocalyptic number.

It is an amenable number.

2879889809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2879889809 is an equidigital number, since it uses as much as digits as its factorization.

2879889809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41803776, while the sum is 68.

The square root of 2879889809 is about 53664.6048061476. The cubic root of 2879889809 is about 1422.7391763039.

The spelling of 2879889809 in words is "two billion, eight hundred seventy-nine million, eight hundred eighty-nine thousand, eight hundred nine".