28997445899 has 2 divisors, whose sum is σ = 28997445900. Its totient is φ = 28997445898.

The previous prime is 28997445871. The next prime is 28997445907. The reversal of 28997445899 is 99854479982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28997445899 is a prime.

It is not a weakly prime, because it can be changed into another prime (28997445839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14498722949 + 14498722950.

It is an arithmetic number, because the mean of its divisors is an integer number (14498722950).

Almost surely, 2^28997445899 is an apocalyptic number.

28997445899 is a deficient number, since it is larger than the sum of its proper divisors (1).

28997445899 is an equidigital number, since it uses as much as digits as its factorization.

28997445899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470292480, while the sum is 74.

The spelling of 28997445899 in words is "twenty-eight billion, nine hundred ninety-seven million, four hundred forty-five thousand, eight hundred ninety-nine".