9101009090 has 8 divisors (see below), whose sum is σ = 16381816380. Its totient is φ = 3640403632.

The previous prime is 9101009089. The next prime is 9101009111. The reversal of 9101009090 is 909001019.

It can be written as a sum of positive squares in 2 ways, for example, as 7409249929 + 1691759161 = 86077^2 + 41131^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455050445 + ... + 455050464.

Almost surely, 2^9101009090 is an apocalyptic number.

9101009090 is a deficient number, since it is larger than the sum of its proper divisors (7280807290).

9101009090 is a wasteful number, since it uses less digits than its factorization.

9101009090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910100916.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 9101009090 is about 95399.2090638072. The cubic root of 9101009090 is about 2087.8366456725.

The spelling of 9101009090 in words is "nine billion, one hundred one million, nine thousand, ninety".