102604109 has 2 divisors, whose sum is σ = 102604110. Its totient is φ = 102604108.

The previous prime is 102604093. The next prime is 102604121. The reversal of 102604109 is 901406201.

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., 97081609 + 5522500 = 9853^2 + 2350^2 .

It is an emirp because it is prime and its reverse (901406201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102604109 - 2⁴ = 102604093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102604169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51302054 + 51302055.

It is an arithmetic number, because the mean of its divisors is an integer number (51302055).

Almost surely, 2^102604109 is an apocalyptic number.

It is an amenable number.

102604109 is a deficient number, since it is larger than the sum of its proper divisors (1).

102604109 is an equidigital number, since it uses as much as digits as its factorization.

102604109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 102604109 is about 10129.3686377780. The cubic root of 102604109 is about 468.1534746967.

The spelling of 102604109 in words is "one hundred two million, six hundred four thousand, one hundred nine".