99811894 has 16 divisors (see below), whose sum is σ = 184268448. Its totient is φ = 39485952.

The previous prime is 99811891. The next prime is 99811931. The reversal of 99811894 is 49811899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99811891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274027 + ... + 274390.

It is an arithmetic number, because the mean of its divisors is an integer number (11516778).

Almost surely, 2^99811894 is an apocalyptic number.

99811894 is a deficient number, since it is larger than the sum of its proper divisors (84456554).

99811894 is a wasteful number, since it uses less digits than its factorization.

99811894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548439.

The product of its digits is 186624, while the sum is 49.

The square root of 99811894 is about 9990.5902728517. The cubic root of 99811894 is about 463.8676637813.

The spelling of 99811894 in words is "ninety-nine million, eight hundred eleven thousand, eight hundred ninety-four".