91384813 has 8 divisors (see below), whose sum is σ = 103594400. Its totient is φ = 79915248.

The previous prime is 91384789. The next prime is 91384823. The reversal of 91384813 is 31848319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91384813 - 2⁵ = 91384781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91384823) 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 7 ways as a sum of consecutive naturals, for example, 184743 + ... + 185236.

It is an arithmetic number, because the mean of its divisors is an integer number (12949300).

Almost surely, 2^91384813 is an apocalyptic number.

It is an amenable number.

91384813 is a deficient number, since it is larger than the sum of its proper divisors (12209587).

91384813 is a wasteful number, since it uses less digits than its factorization.

91384813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370011.

The product of its digits is 20736, while the sum is 37.

The square root of 91384813 is about 9559.5404178234. The cubic root of 91384813 is about 450.4272699038.

The spelling of 91384813 in words is "ninety-one million, three hundred eighty-four thousand, eight hundred thirteen".