99199687 has 4 divisors (see below), whose sum is σ = 99585936. Its totient is φ = 98813440.

The previous prime is 99199679. The next prime is 99199693. The reversal of 99199687 is 78699199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78699199 = 109 ⋅722011.

It is a cyclic number.

It is not a de Polignac number, because 99199687 - 2³ = 99199679 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 (99199637) 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, 192739 + ... + 193252.

It is an arithmetic number, because the mean of its divisors is an integer number (24896484).

Almost surely, 2^99199687 is an apocalyptic number.

99199687 is a deficient number, since it is larger than the sum of its proper divisors (386249).

99199687 is a wasteful number, since it uses less digits than its factorization.

99199687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386248.

The product of its digits is 2204496, while the sum is 58.

The square root of 99199687 is about 9959.9039654005. The cubic root of 99199687 is about 462.9173240321.

The spelling of 99199687 in words is "ninety-nine million, one hundred ninety-nine thousand, six hundred eighty-seven".