91206875 has 10 divisors (see below), whose sum is σ = 113972892. Its totient is φ = 72965000.

The previous prime is 91206847. The next prime is 91206877. The reversal of 91206875 is 57860219.

It is a de Polignac number, because none of the positive numbers 2^k-91206875 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91206877) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 72341 + ... + 73590.

Almost surely, 2^91206875 is an apocalyptic number.

91206875 is a deficient number, since it is larger than the sum of its proper divisors (22766017).

91206875 is an equidigital number, since it uses as much as digits as its factorization.

91206875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145951 (or 145936 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 91206875 is about 9550.2290548447. The cubic root of 91206875 is about 450.1347333184.

The spelling of 91206875 in words is "ninety-one million, two hundred six thousand, eight hundred seventy-five".