99617009 has 2 divisors, whose sum is σ = 99617010. Its totient is φ = 99617008.

The previous prime is 99616969. The next prime is 99617027. The reversal of 99617009 is 90071699.

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., 98109025 + 1507984 = 9905^2 + 1228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99617009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99617039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49808504 + 49808505.

It is an arithmetic number, because the mean of its divisors is an integer number (49808505).

Almost surely, 2^99617009 is an apocalyptic number.

It is an amenable number.

99617009 is a deficient number, since it is larger than the sum of its proper divisors (1).

99617009 is an equidigital number, since it uses as much as digits as its factorization.

99617009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 99617009 is about 9980.8320795413. The cubic root of 99617009 is about 463.5655630112.

The spelling of 99617009 in words is "ninety-nine million, six hundred seventeen thousand, nine".