99994009 has 2 divisors, whose sum is σ = 99994010. Its totient is φ = 99994008.

The previous prime is 99993997. The next prime is 99994021. The reversal of 99994009 is 90049999.

It is a balanced prime because it is at equal distance from previous prime (99993997) and next prime (99994021).

It can be written as a sum of positive squares in only one way, i.e., 90782784 + 9211225 = 9528^2 + 3035^2 .

It is a cyclic number.

It is not a de Polignac number, because 99994009 - 2⁹ = 99993497 is a prime.

It is not a weakly prime, because it can be changed into another prime (99994079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49997004 + 49997005.

It is an arithmetic number, because the mean of its divisors is an integer number (49997005).

Almost surely, 2^99994009 is an apocalyptic number.

It is an amenable number.

99994009 is a deficient number, since it is larger than the sum of its proper divisors (1).

99994009 is an equidigital number, since it uses as much as digits as its factorization.

99994009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 99994009 is about 9999.7004455134. The cubic root of 99994009 is about 464.1496139233.

The spelling of 99994009 in words is "ninety-nine million, nine hundred ninety-four thousand, nine".