196042709 has 2 divisors, whose sum is σ = 196042710. Its totient is φ = 196042708.

The previous prime is 196042699. The next prime is 196042733. The reversal of 196042709 is 907240691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172791025 + 23251684 = 13145^2 + 4822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196042709 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196042739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98021354 + 98021355.

It is an arithmetic number, because the mean of its divisors is an integer number (98021355).

Almost surely, 2^196042709 is an apocalyptic number.

It is an amenable number.

196042709 is a deficient number, since it is larger than the sum of its proper divisors (1).

196042709 is an equidigital number, since it uses as much as digits as its factorization.

196042709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 196042709 is about 14001.5252383446. The cubic root of 196042709 is about 580.9207620319.

The spelling of 196042709 in words is "one hundred ninety-six million, forty-two thousand, seven hundred nine".