91672867 has 18 divisors (see below), whose sum is σ = 109136076. Its totient is φ = 76911120.

The previous prime is 91672837. The next prime is 91672901. The reversal of 91672867 is 76827619.

It is a happy number.

It is not a de Polignac number, because 91672867 - 2¹¹ = 91670819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91672807) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18208 + ... + 22690.

Almost surely, 2^91672867 is an apocalyptic number.

91672867 is a deficient number, since it is larger than the sum of its proper divisors (17463209).

91672867 is a wasteful number, since it uses less digits than its factorization.

91672867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4531 (or 4507 counting only the distinct ones).

The product of its digits is 254016, while the sum is 46.

The square root of 91672867 is about 9574.5948739359. The cubic root of 91672867 is about 450.9000373336.

The spelling of 91672867 in words is "ninety-one million, six hundred seventy-two thousand, eight hundred sixty-seven".