190799309 has 2 divisors, whose sum is σ = 190799310. Its totient is φ = 190799308.

The previous prime is 190799293. The next prime is 190799341. The reversal of 190799309 is 903997091.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190164100 + 635209 = 13790^2 + 797^2 .

It is an emirp because it is prime and its reverse (903997091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190799309 - 2⁴ = 190799293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190799359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95399654 + 95399655.

It is an arithmetic number, because the mean of its divisors is an integer number (95399655).

Almost surely, 2^190799309 is an apocalyptic number.

It is an amenable number.

190799309 is a deficient number, since it is larger than the sum of its proper divisors (1).

190799309 is an equidigital number, since it uses as much as digits as its factorization.

190799309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 190799309 is about 13813.0123072413. The cubic root of 190799309 is about 575.6947458659.

The spelling of 190799309 in words is "one hundred ninety million, seven hundred ninety-nine thousand, three hundred nine".