90099919999 has 2 divisors, whose sum is σ = 90099920000. Its totient is φ = 90099919998.

The previous prime is 90099919937. The next prime is 90099920017. The reversal of 90099919999 is 99991999009.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90099919999 - 2¹³ = 90099911807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90099919909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45049959999 + 45049960000.

It is an arithmetic number, because the mean of its divisors is an integer number (45049960000).

Almost surely, 2^90099919999 is an apocalyptic number.

90099919999 is a deficient number, since it is larger than the sum of its proper divisors (1).

90099919999 is an equidigital number, since it uses as much as digits as its factorization.

90099919999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43046721, while the sum is 73.

The spelling of 90099919999 in words is "ninety billion, ninety-nine million, nine hundred nineteen thousand, nine hundred ninety-nine".