9091009091 has 8 divisors (see below), whose sum is σ = 9182956368. Its totient is φ = 8999100000.

The previous prime is 9091009087. The next prime is 9091009093. The reversal of 9091009091 is 1909001909.

It is a happy number.

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

It is not a de Polignac number, because 9091009091 - 2² = 9091009087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9091009093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913241 + ... + 923141.

It is an arithmetic number, because the mean of its divisors is an integer number (1147869546).

Almost surely, 2^9091009091 is an apocalyptic number.

9091009091 is a deficient number, since it is larger than the sum of its proper divisors (91947277).

9091009091 is a wasteful number, since it uses less digits than its factorization.

9091009091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19093.

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

The square root of 9091009091 is about 95346.7833280179. The cubic root of 9091009091 is about 2087.0716749702.

It can be divided in two parts, 909100 and 9091, that multiplied together give a square (8264628100 = 90910²).

The spelling of 9091009091 in words is "nine billion, ninety-one million, nine thousand, ninety-one".