91284814 has 4 divisors (see below), whose sum is σ = 136927224. Its totient is φ = 45642406.

The previous prime is 91284799. The next prime is 91284833. The reversal of 91284814 is 41848219.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41848219 = 7 ⋅5978317.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22821202 + ... + 22821205.

It is an arithmetic number, because the mean of its divisors is an integer number (34231806).

Almost surely, 2^91284814 is an apocalyptic number.

91284814 is a deficient number, since it is larger than the sum of its proper divisors (45642410).

91284814 is a wasteful number, since it uses less digits than its factorization.

91284814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45642409.

The product of its digits is 18432, while the sum is 37.

The square root of 91284814 is about 9554.3086615411. The cubic root of 91284814 is about 450.2629146737.

The spelling of 91284814 in words is "ninety-one million, two hundred eighty-four thousand, eight hundred fourteen".