99887842 has 4 divisors (see below), whose sum is σ = 149831766. Its totient is φ = 49943920.

The previous prime is 99887791. The next prime is 99887863. The reversal of 99887842 is 24878899.

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

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 32959081 = 8181^2 + 5741^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24971959 + ... + 24971962.

Almost surely, 2^99887842 is an apocalyptic number.

99887842 is a deficient number, since it is larger than the sum of its proper divisors (49943924).

99887842 is a wasteful number, since it uses less digits than its factorization.

99887842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49943923.

The product of its digits is 2322432, while the sum is 55.

The square root of 99887842 is about 9994.3905266905. The cubic root of 99887842 is about 463.9852880046.

The spelling of 99887842 in words is "ninety-nine million, eight hundred eighty-seven thousand, eight hundred forty-two".