91984027 has 4 divisors (see below), whose sum is σ = 95155920. Its totient is φ = 88812136.

The previous prime is 91984021. The next prime is 91984031. The reversal of 91984027 is 72048919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72048919 = 67 ⋅1075357.

It is a cyclic number.

It is not a de Polignac number, because 91984027 - 2²³ = 83595419 is a prime.

It is a super-2 number, since 2×91984027² = 16922122446273458, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91984021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1585903 + ... + 1585960.

It is an arithmetic number, because the mean of its divisors is an integer number (23788980).

Almost surely, 2^91984027 is an apocalyptic number.

91984027 is a deficient number, since it is larger than the sum of its proper divisors (3171893).

91984027 is a wasteful number, since it uses less digits than its factorization.

91984027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171892.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 91984027 is about 9590.8303602973. The cubic root of 91984027 is about 451.4096160094.

It can be divided in two parts, 9198 and 4027, that added together give a square (13225 = 115²).

The spelling of 91984027 in words is "ninety-one million, nine hundred eighty-four thousand, twenty-seven".