91390394 has 16 divisors (see below), whose sum is σ = 143700480. Its totient is φ = 43542240.

The previous prime is 91390373. The next prime is 91390417. The reversal of 91390394 is 49309319.

It is an unprimeable number.

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, 9434 + ... + 16485.

It is an arithmetic number, because the mean of its divisors is an integer number (8981280).

Almost surely, 2^91390394 is an apocalyptic number.

91390394 is a deficient number, since it is larger than the sum of its proper divisors (52310086).

91390394 is a wasteful number, since it uses less digits than its factorization.

91390394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26005.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 91390394 is about 9559.8323207052. The cubic root of 91390394 is about 450.4364391277.

The spelling of 91390394 in words is "ninety-one million, three hundred ninety thousand, three hundred ninety-four".