91889706 has 16 divisors (see below), whose sum is σ = 183911904. Its totient is φ = 30607824.

The previous prime is 91889701. The next prime is 91889713. The reversal of 91889706 is 60798819.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91889701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5056 + ... + 14468.

It is an arithmetic number, because the mean of its divisors is an integer number (11494494).

Almost surely, 2^91889706 is an apocalyptic number.

91889706 is an abundant number, since it is smaller than the sum of its proper divisors (92022198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91889706 is a wasteful number, since it uses less digits than its factorization.

91889706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11045.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 91889706 is about 9585.9118502102. The cubic root of 91889706 is about 451.2552704883.

The spelling of 91889706 in words is "ninety-one million, eight hundred eighty-nine thousand, seven hundred six".