7900002109 has 2 divisors, whose sum is σ = 7900002110. Its totient is φ = 7900002108.

The previous prime is 7900002101. The next prime is 7900002151. The reversal of 7900002109 is 9012000097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5024683225 + 2875318884 = 70885^2 + 53622^2 .

It is a cyclic number.

It is not a de Polignac number, because 7900002109 - 2³ = 7900002101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7900002101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3950001054 + 3950001055.

It is an arithmetic number, because the mean of its divisors is an integer number (3950001055).

Almost surely, 2^7900002109 is an apocalyptic number.

It is an amenable number.

7900002109 is a deficient number, since it is larger than the sum of its proper divisors (1).

7900002109 is an equidigital number, since it uses as much as digits as its factorization.

7900002109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 7900002109 is about 88881.9560372070. The cubic root of 7900002109 is about 1991.6318785199.

The spelling of 7900002109 in words is "seven billion, nine hundred million, two thousand, one hundred nine".