91448197 has 4 divisors (see below), whose sum is σ = 96261280. Its totient is φ = 86635116.

The previous prime is 91448183. The next prime is 91448209. The reversal of 91448197 is 79184419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91448197 - 2¹¹ = 91446149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91448597) 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, 2406513 + ... + 2406550.

It is an arithmetic number, because the mean of its divisors is an integer number (24065320).

Almost surely, 2^91448197 is an apocalyptic number.

It is an amenable number.

91448197 is a deficient number, since it is larger than the sum of its proper divisors (4813083).

91448197 is a wasteful number, since it uses less digits than its factorization.

91448197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813082.

The product of its digits is 72576, while the sum is 43.

The square root of 91448197 is about 9562.8550653035. The cubic root of 91448197 is about 450.5313837896.

The spelling of 91448197 in words is "ninety-one million, four hundred forty-eight thousand, one hundred ninety-seven".