99409189838087 has 4 divisors (see below), whose sum is σ = 99574596144576. Its totient is φ = 99243783531600.

The previous prime is 99409189838047. The next prime is 99409189838107. The reversal of 99409189838087 is 78083898190499.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99409189838087 - 2¹⁰ = 99409189837063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99409189837996 and 99409189838014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99409189838047) 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, 82703152343 + ... + 82703153544.

It is an arithmetic number, because the mean of its divisors is an integer number (24893649036144).

Almost surely, 2^{99409189838087} is an apocalyptic number.

99409189838087 is a deficient number, since it is larger than the sum of its proper divisors (165406306489).

99409189838087 is a wasteful number, since it uses less digits than its factorization.

99409189838087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165406306488.

The product of its (nonzero) digits is 2257403904, while the sum is 83.

The spelling of 99409189838087 in words is "ninety-nine trillion, four hundred nine billion, one hundred eighty-nine million, eight hundred thirty-eight thousand, eighty-seven".