91159027 has 4 divisors (see below), whose sum is σ = 91197576. Its totient is φ = 91120480.

The previous prime is 91159007. The next prime is 91159037. The reversal of 91159027 is 72095119.

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-91159027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91158983 and 91159001.

It is not an unprimeable number, because it can be changed into a prime (91159007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15478 + ... + 20539.

It is an arithmetic number, because the mean of its divisors is an integer number (22799394).

Almost surely, 2^91159027 is an apocalyptic number.

91159027 is a deficient number, since it is larger than the sum of its proper divisors (38549).

91159027 is a wasteful number, since it uses less digits than its factorization.

91159027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38548.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 91159027 is about 9547.7236554060. The cubic root of 91159027 is about 450.0560045523.

The spelling of 91159027 in words is "ninety-one million, one hundred fifty-nine thousand, twenty-seven".