99993994 has 4 divisors (see below), whose sum is σ = 149990994. Its totient is φ = 49996996.

The previous prime is 99993991. The next prime is 99993997. The reversal of 99993994 is 49939999.

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

It is an interprime number because it is at equal distance from previous prime (99993991) and next prime (99993997).

It can be written as a sum of positive squares in only one way, i.e., 60140025 + 39853969 = 7755^2 + 6313^2 .

It is not an unprimeable number, because it can be changed into a prime (99993991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24998497 + ... + 24998500.

Almost surely, 2^99993994 is an apocalyptic number.

99993994 is a deficient number, since it is larger than the sum of its proper divisors (49997000).

99993994 is a wasteful number, since it uses less digits than its factorization.

99993994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49996999.

The product of its digits is 6377292, while the sum is 61.

The square root of 99993994 is about 9999.6996954909. The cubic root of 99993994 is about 464.1495907144.

The spelling of 99993994 in words is "ninety-nine million, nine hundred ninety-three thousand, nine hundred ninety-four".