90899999999 has 8 divisors (see below), whose sum is σ = 94863605760. Its totient is φ = 86937346936.

The previous prime is 90899999963. The next prime is 90900000001. The reversal of 90899999999 is 99999999809.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90899999999 is a prime.

It is a Duffinian number.

90899999999 is a modest number, since divided by 999999 gives 90899 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90899999909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39659 + ... + 428220.

It is an arithmetic number, because the mean of its divisors is an integer number (11857950720).

Almost surely, 2^90899999999 is an apocalyptic number.

90899999999 is a deficient number, since it is larger than the sum of its proper divisors (3963605761).

90899999999 is a wasteful number, since it uses less digits than its factorization.

90899999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476349.

The product of its (nonzero) digits is 3099363912, while the sum is 89.

The spelling of 90899999999 in words is "ninety billion, eight hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".