99194861 has 4 divisors (see below), whose sum is σ = 100309500. Its totient is φ = 98080224.

The previous prime is 99194831. The next prime is 99194869. The reversal of 99194861 is 16849199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16849199 = 79 ⋅213281.

It can be written as a sum of positive squares in 2 ways, for example, as 5221225 + 93973636 = 2285^2 + 9694^2 .

It is a cyclic number.

It is not a de Polignac number, because 99194861 - 2¹⁰ = 99193837 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 (99194869) 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, 557186 + ... + 557363.

It is an arithmetic number, because the mean of its divisors is an integer number (25077375).

Almost surely, 2^99194861 is an apocalyptic number.

It is an amenable number.

99194861 is a deficient number, since it is larger than the sum of its proper divisors (1114639).

99194861 is a wasteful number, since it uses less digits than its factorization.

99194861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114638.

The product of its digits is 139968, while the sum is 47.

The square root of 99194861 is about 9959.6616910415. The cubic root of 99194861 is about 462.9098170352.

The spelling of 99194861 in words is "ninety-nine million, one hundred ninety-four thousand, eight hundred sixty-one".