9090919100 has 36 divisors (see below), whose sum is σ = 19922636328. Its totient is φ = 3600360000.

The previous prime is 9090919093. The next prime is 9090919109. The reversal of 9090919100 is 19190909.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090919109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 439946 + ... + 460145.

Almost surely, 2^9090919100 is an apocalyptic number.

It is an amenable number.

9090919100 is an abundant number, since it is smaller than the sum of its proper divisors (10831717228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9090919100 is a wasteful number, since it uses less digits than its factorization.

9090919100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900206 (or 900199 counting only the distinct ones).

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

The square root of 9090919100 is about 95346.3114126603. The cubic root of 9090919100 is about 2087.0647883754.

The spelling of 9090919100 in words is "nine billion, ninety million, nine hundred nineteen thousand, one hundred".