91190159 has 4 divisors (see below), whose sum is σ = 96554304. Its totient is φ = 85826016.

The previous prime is 91190129. The next prime is 91190161. The reversal of 91190159 is 95109119.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91190159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91190119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2682047 + ... + 2682080.

It is an arithmetic number, because the mean of its divisors is an integer number (24138576).

Almost surely, 2^91190159 is an apocalyptic number.

91190159 is a deficient number, since it is larger than the sum of its proper divisors (5364145).

91190159 is a wasteful number, since it uses less digits than its factorization.

91190159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364144.

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 91190159 is about 9549.3538524866. The cubic root of 91190159 is about 450.1072320584.

The spelling of 91190159 in words is "ninety-one million, one hundred ninety thousand, one hundred fifty-nine".