91156 has 12 divisors (see below), whose sum is σ = 171892. Its totient is φ = 42048.

The previous prime is 91153. The next prime is 91159. The reversal of 91156 is 65119.

It is an interprime number because it is at equal distance from previous prime (91153) and next prime (91159).

It can be written as a sum of positive squares in 2 ways, for example, as 7056 + 84100 = 84^2 + 290^2 .

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91151) 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, 825 + ... + 928.

2⁹¹¹⁵⁶ is an apocalyptic number.

It is an amenable number.

91156 is a deficient number, since it is larger than the sum of its proper divisors (80736).

91156 is a wasteful number, since it uses less digits than its factorization.

91156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770 (or 1768 counting only the distinct ones).

The product of its digits is 270, while the sum is 22.

The square root of 91156 is about 301.9205193424. The cubic root of 91156 is about 45.0051023021.

It can be divided in two parts, 91 and 156, that multiplied together give a triangular number (14196 = T₁₆₈).

The spelling of 91156 in words is "ninety-one thousand, one hundred fifty-six".