99901994 has 16 divisors (see below), whose sum is σ = 153994176. Its totient is φ = 48578400.

The previous prime is 99901987. The next prime is 99901999. The reversal of 99901994 is 49910999.

It is not an unprimeable number, because it can be changed into a prime (99901999) 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, 26699 + ... + 30209.

It is an arithmetic number, because the mean of its divisors is an integer number (9624636).

Almost surely, 2^99901994 is an apocalyptic number.

99901994 is a deficient number, since it is larger than the sum of its proper divisors (54092182).

99901994 is a wasteful number, since it uses less digits than its factorization.

99901994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901.

The product of its (nonzero) digits is 236196, while the sum is 50.

The square root of 99901994 is about 9995.0984987643. The cubic root of 99901994 is about 464.0071992789.

The spelling of 99901994 in words is "ninety-nine million, nine hundred one thousand, nine hundred ninety-four".