90099019 has 4 divisors (see below), whose sum is σ = 90319720. Its totient is φ = 89878320.

The previous prime is 90099001. The next prime is 90099091. The reversal of 90099019 is 91099009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91099009 = 59 ⋅1544051.

It is a cyclic number.

It is not a de Polignac number, because 90099019 - 2¹¹ = 90096971 is a prime.

It is a super-2 number, since 2×90099019² = 16235666449524722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90099719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109737 + ... + 110554.

It is an arithmetic number, because the mean of its divisors is an integer number (22579930).

Almost surely, 2^90099019 is an apocalyptic number.

90099019 is a deficient number, since it is larger than the sum of its proper divisors (220701).

90099019 is a wasteful number, since it uses less digits than its factorization.

90099019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220700.

The product of its (nonzero) digits is 6561, while the sum is 37.

The square root of 90099019 is about 9492.0503053871. The cubic root of 90099019 is about 448.3047641293.

The spelling of 90099019 in words is "ninety million, ninety-nine thousand, nineteen".