91074591 has 16 divisors (see below), whose sum is σ = 135110400. Its totient is φ = 60633144.

The previous prime is 91074589. The next prime is 91074637. The reversal of 91074591 is 19547019.

It is not a de Polignac number, because 91074591 - 2¹ = 91074589 is a prime.

It is a super-2 number, since 2×91074591² = 16589162251634562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91074541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22630 + ... + 26348.

It is an arithmetic number, because the mean of its divisors is an integer number (8444400).

Almost surely, 2^91074591 is an apocalyptic number.

91074591 is a deficient number, since it is larger than the sum of its proper divisors (44035809).

91074591 is a wasteful number, since it uses less digits than its factorization.

91074591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635 (or 4629 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 91074591 is about 9543.3008440476. The cubic root of 91074591 is about 449.9170069168.

The spelling of 91074591 in words is "ninety-one million, seventy-four thousand, five hundred ninety-one".