91091102 has 8 divisors (see below), whose sum is σ = 137156976. Its totient is φ = 45372112.

The previous prime is 91091081. The next prime is 91091129. The reversal of 91091102 is 20119019.

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

It is a congruent 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, 86063 + ... + 87114.

It is an arithmetic number, because the mean of its divisors is an integer number (17144622).

Almost surely, 2^91091102 is an apocalyptic number.

91091102 is a deficient number, since it is larger than the sum of its proper divisors (46065874).

91091102 is a wasteful number, since it uses less digits than its factorization.

91091102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173442.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 91091102 is about 9544.1658619284. The cubic root of 91091102 is about 449.9441939026.

The spelling of 91091102 in words is "ninety-one million, ninety-one thousand, one hundred two".