90000899999 has 2 divisors, whose sum is σ = 90000900000. Its totient is φ = 90000899998.

The previous prime is 90000899977. The next prime is 90000900131. The reversal of 90000899999 is 99999800009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90000899999 - 2⁸ = 90000899743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90000899969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45000449999 + 45000450000.

It is an arithmetic number, because the mean of its divisors is an integer number (45000450000).

Almost surely, 2^90000899999 is an apocalyptic number.

90000899999 is a deficient number, since it is larger than the sum of its proper divisors (1).

90000899999 is an equidigital number, since it uses as much as digits as its factorization.

90000899999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4251528, while the sum is 62.

The spelling of 90000899999 in words is "ninety billion, eight hundred ninety-nine thousand, nine hundred ninety-nine".