90909119 has 4 divisors (see below), whose sum is σ = 103896144. Its totient is φ = 77922096.

The previous prime is 90909109. The next prime is 90909121. The reversal of 90909119 is 91190909.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91190909 = 71 ⋅1284379.

It is not a de Polignac number, because 90909119 - 2²⁰ = 89860543 is a prime.

It is a super-2 number, since 2×90909119² = 16528935834712322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90909109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6493502 + ... + 6493515.

It is an arithmetic number, because the mean of its divisors is an integer number (25974036).

Almost surely, 2^90909119 is an apocalyptic number.

90909119 is a deficient number, since it is larger than the sum of its proper divisors (12987025).

90909119 is a wasteful number, since it uses less digits than its factorization.

90909119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12987024.

The product of its (nonzero) digits is 6561, while the sum is 38.

The square root of 90909119 is about 9534.6273655555. The cubic root of 90909119 is about 449.6443593360.

The spelling of 90909119 in words is "ninety million, nine hundred nine thousand, one hundred nineteen".