99730009 has 2 divisors, whose sum is σ = 99730010. Its totient is φ = 99730008.

The previous prime is 99729989. The next prime is 99730013. The reversal of 99730009 is 90003799.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68425984 + 31304025 = 8272^2 + 5595^2 .

It is a cyclic number.

It is not a de Polignac number, because 99730009 - 2⁵ = 99729977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99730009.

It is not a weakly prime, because it can be changed into another prime (99730019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49865004 + 49865005.

It is an arithmetic number, because the mean of its divisors is an integer number (49865005).

Almost surely, 2^99730009 is an apocalyptic number.

It is an amenable number.

99730009 is a deficient number, since it is larger than the sum of its proper divisors (1).

99730009 is an equidigital number, since it uses as much as digits as its factorization.

99730009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 99730009 is about 9986.4913257860. The cubic root of 99730009 is about 463.7407777825.

The spelling of 99730009 in words is "ninety-nine million, seven hundred thirty thousand, nine".