91996135 has 32 divisors (see below), whose sum is σ = 140861952. Its totient is φ = 56004480.

The previous prime is 91996123. The next prime is 91996147. The reversal of 91996135 is 53169919.

It is an interprime number because it is at equal distance from previous prime (91996123) and next prime (91996147).

It is not a de Polignac number, because 91996135 - 2¹⁷ = 91865063 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 91996091 and 91996100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13777 + ... + 19333.

It is an arithmetic number, because the mean of its divisors is an integer number (4401936).

Almost surely, 2^91996135 is an apocalyptic number.

91996135 is a deficient number, since it is larger than the sum of its proper divisors (48865817).

91996135 is a wasteful number, since it uses less digits than its factorization.

91996135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623.

The product of its digits is 65610, while the sum is 43.

The square root of 91996135 is about 9591.4615674568. The cubic root of 91996135 is about 451.4294217228.

The spelling of 91996135 in words is "ninety-one million, nine hundred ninety-six thousand, one hundred thirty-five".