99104009 has 2 divisors, whose sum is σ = 99104010. Its totient is φ = 99104008.

The previous prime is 99104003. The next prime is 99104039. The reversal of 99104009 is 90040199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94575625 + 4528384 = 9725^2 + 2128^2 .

It is an emirp because it is prime and its reverse (90040199) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99104009 is a prime.

It is not a weakly prime, because it can be changed into another prime (99104003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49552004 + 49552005.

It is an arithmetic number, because the mean of its divisors is an integer number (49552005).

Almost surely, 2^99104009 is an apocalyptic number.

It is an amenable number.

99104009 is a deficient number, since it is larger than the sum of its proper divisors (1).

99104009 is an equidigital number, since it uses as much as digits as its factorization.

99104009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 99104009 is about 9955.0996479192. The cubic root of 99104009 is about 462.7684483913.

The spelling of 99104009 in words is "ninety-nine million, one hundred four thousand, nine".