91668134 has 4 divisors (see below), whose sum is σ = 137502204. Its totient is φ = 45834066.

The previous prime is 91668113. The next prime is 91668151. The reversal of 91668134 is 43186619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43186619 = 7 ⋅6169517.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 22917032 + ... + 22917035.

It is an arithmetic number, because the mean of its divisors is an integer number (34375551).

Almost surely, 2^91668134 is an apocalyptic number.

91668134 is a deficient number, since it is larger than the sum of its proper divisors (45834070).

91668134 is a wasteful number, since it uses less digits than its factorization.

91668134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45834069.

The product of its digits is 31104, while the sum is 38.

The square root of 91668134 is about 9574.3477062409. The cubic root of 91668134 is about 450.8922773254.

The spelling of 91668134 in words is "ninety-one million, six hundred sixty-eight thousand, one hundred thirty-four".