91180867 has 4 divisors (see below), whose sum is σ = 95979880. Its totient is φ = 86381856.

The previous prime is 91180841. The next prime is 91180879. The reversal of 91180867 is 76808119.

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

It is a cyclic number.

It is not a de Polignac number, because 91180867 - 2¹¹ = 91178819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91180807) 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, 2399478 + ... + 2399515.

It is an arithmetic number, because the mean of its divisors is an integer number (23994970).

Almost surely, 2^91180867 is an apocalyptic number.

91180867 is a deficient number, since it is larger than the sum of its proper divisors (4799013).

91180867 is a wasteful number, since it uses less digits than its factorization.

91180867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4799012.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 91180867 is about 9548.8673150275. The cubic root of 91180867 is about 450.0919433529.

The spelling of 91180867 in words is "ninety-one million, one hundred eighty thousand, eight hundred sixty-seven".