91199119 has 16 divisors (see below), whose sum is σ = 101711520. Its totient is φ = 81077760.

The previous prime is 91199111. The next prime is 91199131.

91199119 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 91199119 - 2³ = 91199111 is a prime.

It is a super-2 number, since 2×91199119² = 16634558612752322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91199111) 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 15 ways as a sum of consecutive naturals, for example, 109597 + ... + 110425.

It is an arithmetic number, because the mean of its divisors is an integer number (6356970).

Almost surely, 2^91199119 is an apocalyptic number.

91199119 is a deficient number, since it is larger than the sum of its proper divisors (10512401).

91199119 is a wasteful number, since it uses less digits than its factorization.

91199119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050.

The product of its digits is 6561, while the sum is 40.

The square root of 91199119 is about 9549.8229826526. The cubic root of 91199119 is about 450.1219735202.

The spelling of 91199119 in words is "ninety-one million, one hundred ninety-nine thousand, one hundred nineteen".