102124409 has 2 divisors, whose sum is σ = 102124410. Its totient is φ = 102124408.

The previous prime is 102124381. The next prime is 102124417. The reversal of 102124409 is 904421201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66064384 + 36060025 = 8128^2 + 6005^2 .

It is an emirp because it is prime and its reverse (904421201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102124409 - 2²⁰ = 101075833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (102124459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51062204 + 51062205.

It is an arithmetic number, because the mean of its divisors is an integer number (51062205).

Almost surely, 2^102124409 is an apocalyptic number.

It is an amenable number.

102124409 is a deficient number, since it is larger than the sum of its proper divisors (1).

102124409 is an equidigital number, since it uses as much as digits as its factorization.

102124409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 102124409 is about 10105.6622247134. The cubic root of 102124409 is about 467.4227563573.

The spelling of 102124409 in words is "one hundred two million, one hundred twenty-four thousand, four hundred nine".