91384004 has 24 divisors (see below), whose sum is σ = 162373848. Its totient is φ = 44997120.

The previous prime is 91384003. The next prime is 91384009. The reversal of 91384004 is 40048319.

It can be written as a sum of positive squares in 4 ways, for example, as 25806400 + 65577604 = 5080^2 + 8098^2 .

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (91384003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81254 + ... + 82370.

It is an arithmetic number, because the mean of its divisors is an integer number (6765577).

Almost surely, 2^91384004 is an apocalyptic number.

It is an amenable number.

91384004 is a deficient number, since it is larger than the sum of its proper divisors (70989844).

91384004 is a wasteful number, since it uses less digits than its factorization.

91384004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 91384004 is about 9559.4981039801. The cubic root of 91384004 is about 450.4259407379.

The spelling of 91384004 in words is "ninety-one million, three hundred eighty-four thousand, four".