99961994 has 16 divisors (see below), whose sum is σ = 163728000. Its totient is φ = 45394560.

The previous prime is 99961993. The next prime is 99962017. The reversal of 99961994 is 49916999.

It is not an unprimeable number, because it can be changed into a prime (99961993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42842 + ... + 45114.

It is an arithmetic number, because the mean of its divisors is an integer number (10233000).

Almost surely, 2^99961994 is an apocalyptic number.

99961994 is a deficient number, since it is larger than the sum of its proper divisors (63766006).

99961994 is a wasteful number, since it uses less digits than its factorization.

99961994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4285.

The product of its digits is 1417176, while the sum is 56.

The square root of 99961994 is about 9998.0995194087. The cubic root of 99961994 is about 464.1000731684.

The spelling of 99961994 in words is "ninety-nine million, nine hundred sixty-one thousand, nine hundred ninety-four".