1870950135209 has 2 divisors, whose sum is σ = 1870950135210. Its totient is φ = 1870950135208.

The previous prime is 1870950135203. The next prime is 1870950135247. The reversal of 1870950135209 is 9025310590781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1611592165225 + 259357969984 = 1269485^2 + 509272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1870950135209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1870950135203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 935475067604 + 935475067605.

It is an arithmetic number, because the mean of its divisors is an integer number (935475067605).

Almost surely, 2^{1870950135209} is an apocalyptic number.

It is an amenable number.

1870950135209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1870950135209 is an equidigital number, since it uses as much as digits as its factorization.

1870950135209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 50.

The spelling of 1870950135209 in words is "one trillion, eight hundred seventy billion, nine hundred fifty million, one hundred thirty-five thousand, two hundred nine".