99197405 has 4 divisors (see below), whose sum is σ = 119036892. Its totient is φ = 79357920.

The previous prime is 99197387. The next prime is 99197447. The reversal of 99197405 is 50479199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50479199 = 191 ⋅264289.

It can be written as a sum of positive squares in 2 ways, for example, as 21104836 + 78092569 = 4594^2 + 8837^2 .

It is not a de Polignac number, because 99197405 - 2⁸ = 99197149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9919736 + ... + 9919745.

It is an arithmetic number, because the mean of its divisors is an integer number (29759223).

Almost surely, 2^99197405 is an apocalyptic number.

It is an amenable number.

99197405 is a deficient number, since it is larger than the sum of its proper divisors (19839487).

99197405 is a wasteful number, since it uses less digits than its factorization.

99197405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19839486.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 99197405 is about 9959.7894054041. The cubic root of 99197405 is about 462.9137743387.

The spelling of 99197405 in words is "ninety-nine million, one hundred ninety-seven thousand, four hundred five".