199766429 has 2 divisors, whose sum is σ = 199766430. Its totient is φ = 199766428.

The previous prime is 199766423. The next prime is 199766447. The reversal of 199766429 is 924667991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116683204 + 83083225 = 10802^2 + 9115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199766429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199766423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99883214 + 99883215.

It is an arithmetic number, because the mean of its divisors is an integer number (99883215).

Almost surely, 2^199766429 is an apocalyptic number.

It is an amenable number.

199766429 is a deficient number, since it is larger than the sum of its proper divisors (1).

199766429 is an equidigital number, since it uses as much as digits as its factorization.

199766429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 53.

The square root of 199766429 is about 14133.8752293913. The cubic root of 199766429 is about 584.5758037132.

The spelling of 199766429 in words is "one hundred ninety-nine million, seven hundred sixty-six thousand, four hundred twenty-nine".