97891199 has 4 divisors (see below), whose sum is σ = 111875664. Its totient is φ = 83906736.

The previous prime is 97891193. The next prime is 97891223. The reversal of 97891199 is 99119879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99119879 = 1753 ⋅56543.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97891199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97891199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97891193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6992222 + ... + 6992235.

It is an arithmetic number, because the mean of its divisors is an integer number (27968916).

Almost surely, 2^97891199 is an apocalyptic number.

97891199 is a deficient number, since it is larger than the sum of its proper divisors (13984465).

97891199 is a wasteful number, since it uses less digits than its factorization.

97891199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13984464.

The product of its digits is 367416, while the sum is 53.

The square root of 97891199 is about 9893.9981301797. The cubic root of 97891199 is about 460.8729469511.

The spelling of 97891199 in words is "ninety-seven million, eight hundred ninety-one thousand, one hundred ninety-nine".