91097894 has 16 divisors (see below), whose sum is σ = 150094080. Its totient is φ = 41275080.

The previous prime is 91097893. The next prime is 91097921. The reversal of 91097894 is 49879019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91097893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51242 + ... + 52989.

It is an arithmetic number, because the mean of its divisors is an integer number (9380880).

Almost surely, 2^91097894 is an apocalyptic number.

91097894 is a deficient number, since it is larger than the sum of its proper divisors (58996186).

91097894 is a wasteful number, since it uses less digits than its factorization.

91097894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104275.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 91097894 is about 9544.5216747619. The cubic root of 91097894 is about 449.9553766451.

The spelling of 91097894 in words is "ninety-one million, ninety-seven thousand, eight hundred ninety-four".