102004140209 has 2 divisors, whose sum is σ = 102004140210. Its totient is φ = 102004140208.

The previous prime is 102004140193. The next prime is 102004140211. The reversal of 102004140209 is 902041400201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95834823184 + 6169317025 = 309572^2 + 78545^2 .

It is a cyclic number.

It is not a de Polignac number, because 102004140209 - 2⁴ = 102004140193 is a prime.

Together with 102004140211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102004140239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51002070104 + 51002070105.

It is an arithmetic number, because the mean of its divisors is an integer number (51002070105).

Almost surely, 2^102004140209 is an apocalyptic number.

It is an amenable number.

102004140209 is a deficient number, since it is larger than the sum of its proper divisors (1).

102004140209 is an equidigital number, since it uses as much as digits as its factorization.

102004140209 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 spelling of 102004140209 in words is "one hundred two billion, four million, one hundred forty thousand, two hundred nine".