9090912791 has 4 divisors (see below), whose sum is σ = 9097027872. Its totient is φ = 9084797712.

The previous prime is 9090912763. The next prime is 9090912793. The reversal of 9090912791 is 1972190909.

It is a happy number.

9090912791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9090912791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090912793) 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, 3055310 + ... + 3058283.

It is an arithmetic number, because the mean of its divisors is an integer number (2274256968).

Almost surely, 2^9090912791 is an apocalyptic number.

9090912791 is a deficient number, since it is larger than the sum of its proper divisors (6115081).

9090912791 is a wasteful number, since it uses less digits than its factorization.

9090912791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115080.

The product of its (nonzero) digits is 91854, while the sum is 47.

The square root of 9090912791 is about 95346.2783279977. The cubic root of 9090912791 is about 2087.0643055752.

The spelling of 9090912791 in words is "nine billion, ninety million, nine hundred twelve thousand, seven hundred ninety-one".