91189349 has 4 divisors (see below), whose sum is σ = 93653964. Its totient is φ = 88724736.

The previous prime is 91189333. The next prime is 91189363. The reversal of 91189349 is 94398119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94398119 = 619 ⋅152501.

It can be written as a sum of positive squares in 2 ways, for example, as 77757124 + 13432225 = 8818^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 91189349 - 2⁴ = 91189333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91189249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1232252 + ... + 1232325.

It is an arithmetic number, because the mean of its divisors is an integer number (23413491).

Almost surely, 2^91189349 is an apocalyptic number.

It is an amenable number.

91189349 is a deficient number, since it is larger than the sum of its proper divisors (2464615).

91189349 is a wasteful number, since it uses less digits than its factorization.

91189349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464614.

The product of its digits is 69984, while the sum is 44.

The square root of 91189349 is about 9549.3114411459. The cubic root of 91189349 is about 450.1058993564.

The spelling of 91189349 in words is "ninety-one million, one hundred eighty-nine thousand, three hundred forty-nine".