99834420887 has 4 divisors (see below), whose sum is σ = 100202813856. Its totient is φ = 99466027920.

The previous prime is 99834420883. The next prime is 99834420923. The reversal of 99834420887 is 78802443899.

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 99834420887 - 2² = 99834420883 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 (99834420883) 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, 184196078 + ... + 184196619.

It is an arithmetic number, because the mean of its divisors is an integer number (25050703464).

Almost surely, 2^99834420887 is an apocalyptic number.

99834420887 is a deficient number, since it is larger than the sum of its proper divisors (368392969).

99834420887 is a wasteful number, since it uses less digits than its factorization.

99834420887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368392968.

The product of its (nonzero) digits is 27869184, while the sum is 62.

The spelling of 99834420887 in words is "ninety-nine billion, eight hundred thirty-four million, four hundred twenty thousand, eight hundred eighty-seven".