99687118 has 4 divisors (see below), whose sum is σ = 149530680. Its totient is φ = 49843558.

The previous prime is 99687073. The next prime is 99687157. The reversal of 99687118 is 81178699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81178699 = 7 ⋅11596957.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24921778 + ... + 24921781.

It is an arithmetic number, because the mean of its divisors is an integer number (37382670).

Almost surely, 2^99687118 is an apocalyptic number.

99687118 is a deficient number, since it is larger than the sum of its proper divisors (49843562).

99687118 is a wasteful number, since it uses less digits than its factorization.

99687118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49843561.

The product of its digits is 217728, while the sum is 49.

The square root of 99687118 is about 9984.3436439257. The cubic root of 99687118 is about 463.6742877394.

The spelling of 99687118 in words is "ninety-nine million, six hundred eighty-seven thousand, one hundred eighteen".