196663739 has 2 divisors, whose sum is σ = 196663740. Its totient is φ = 196663738.

The previous prime is 196663729. The next prime is 196663741. The reversal of 196663739 is 937366691.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196663739 - 2⁸ = 196663483 is a prime.

Together with 196663741, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (196663729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98331869 + 98331870.

It is an arithmetic number, because the mean of its divisors is an integer number (98331870).

Almost surely, 2^196663739 is an apocalyptic number.

196663739 is a deficient number, since it is larger than the sum of its proper divisors (1).

196663739 is an equidigital number, since it uses as much as digits as its factorization.

196663739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 50.

The square root of 196663739 is about 14023.6849294328. The cubic root of 196663739 is about 581.5335348640.

The spelling of 196663739 in words is "one hundred ninety-six million, six hundred sixty-three thousand, seven hundred thirty-nine".