28909017899 has 2 divisors, whose sum is σ = 28909017900. Its totient is φ = 28909017898.

The previous prime is 28909017887. The next prime is 28909017913. The reversal of 28909017899 is 99871090982.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28909017899 is a prime.

It is not a weakly prime, because it can be changed into another prime (28909017829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14454508949 + 14454508950.

It is an arithmetic number, because the mean of its divisors is an integer number (14454508950).

Almost surely, 2^28909017899 is an apocalyptic number.

28909017899 is a deficient number, since it is larger than the sum of its proper divisors (1).

28909017899 is an equidigital number, since it uses as much as digits as its factorization.

28909017899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 62.

The spelling of 28909017899 in words is "twenty-eight billion, nine hundred nine million, seventeen thousand, eight hundred ninety-nine".