91081214 has 16 divisors (see below), whose sum is σ = 158340096. Its totient is φ = 38484600.

The previous prime is 91081169. The next prime is 91081217. The reversal of 91081214 is 41218019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91081217) 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, 44822 + ... + 46809.

It is an arithmetic number, because the mean of its divisors is an integer number (9896256).

Almost surely, 2^91081214 is an apocalyptic number.

91081214 is a deficient number, since it is larger than the sum of its proper divisors (67258882).

91081214 is a wasteful number, since it uses less digits than its factorization.

91081214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91711.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 91081214 is about 9543.6478350786. The cubic root of 91081214 is about 449.9279127325.

The spelling of 91081214 in words is "ninety-one million, eighty-one thousand, two hundred fourteen".