91146091 has 4 divisors (see below), whose sum is σ = 92691000. Its totient is φ = 89601184.

The previous prime is 91146073. The next prime is 91146119. The reversal of 91146091 is 19064119.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91146091 - 2¹⁷ = 91015019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91146071) 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, 772366 + ... + 772483.

It is an arithmetic number, because the mean of its divisors is an integer number (23172750).

Almost surely, 2^91146091 is an apocalyptic number.

91146091 is a deficient number, since it is larger than the sum of its proper divisors (1544909).

91146091 is a wasteful number, since it uses less digits than its factorization.

91146091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544908.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 91146091 is about 9547.0461924095. The cubic root of 91146091 is about 450.0347150173.

The spelling of 91146091 in words is "ninety-one million, one hundred forty-six thousand, ninety-one".