91836091 has 4 divisors (see below), whose sum is σ = 97238232. Its totient is φ = 86433952.

The previous prime is 91836077. The next prime is 91836133. The reversal of 91836091 is 19063819.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19063819 = 3643 ⋅5233.

It is a cyclic number.

It is not a de Polignac number, because 91836091 - 2⁷ = 91835963 is a prime.

It is a super-2 number, since 2×91836091² = 16867735220320562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91836091.

It is not an unprimeable number, because it can be changed into a prime (91836071) 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, 2701045 + ... + 2701078.

It is an arithmetic number, because the mean of its divisors is an integer number (24309558).

Almost surely, 2^91836091 is an apocalyptic number.

91836091 is a deficient number, since it is larger than the sum of its proper divisors (5402141).

91836091 is a wasteful number, since it uses less digits than its factorization.

91836091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402140.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 91836091 is about 9583.1148902640. The cubic root of 91836091 is about 451.1674885905.

The spelling of 91836091 in words is "ninety-one million, eight hundred thirty-six thousand, ninety-one".