99784950887 has 4 divisors (see below), whose sum is σ = 101420769816. Its totient is φ = 98149131960.

The previous prime is 99784950871. The next prime is 99784950901. The reversal of 99784950887 is 78805948799.

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 99784950887 - 2⁴ = 99784950871 is a prime.

It is a super-3 number, since 3×99784950887³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99784050887) 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, 817909373 + ... + 817909494.

It is an arithmetic number, because the mean of its divisors is an integer number (25355192454).

Almost surely, 2^99784950887 is an apocalyptic number.

99784950887 is a deficient number, since it is larger than the sum of its proper divisors (1635818929).

99784950887 is a wasteful number, since it uses less digits than its factorization.

99784950887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635818928.

The product of its (nonzero) digits is 365783040, while the sum is 74.

The spelling of 99784950887 in words is "ninety-nine billion, seven hundred eighty-four million, nine hundred fifty thousand, eight hundred eighty-seven".