199252709 has 2 divisors, whose sum is σ = 199252710. Its totient is φ = 199252708.

The previous prime is 199252687. The next prime is 199252721. The reversal of 199252709 is 907252991.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196840900 + 2411809 = 14030^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 199252709 - 2¹² = 199248613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199252709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199252759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99626354 + 99626355.

It is an arithmetic number, because the mean of its divisors is an integer number (99626355).

Almost surely, 2^199252709 is an apocalyptic number.

It is an amenable number.

199252709 is a deficient number, since it is larger than the sum of its proper divisors (1).

199252709 is an equidigital number, since it uses as much as digits as its factorization.

199252709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 199252709 is about 14115.6901708701. The cubic root of 199252709 is about 584.0742745417.

The spelling of 199252709 in words is "one hundred ninety-nine million, two hundred fifty-two thousand, seven hundred nine".