196039639 has 2 divisors, whose sum is σ = 196039640. Its totient is φ = 196039638.

The previous prime is 196039583. The next prime is 196039643. The reversal of 196039639 is 936930691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196039639 - 2⁹ = 196039127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196039139) 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, 98019819 + 98019820.

It is an arithmetic number, because the mean of its divisors is an integer number (98019820).

Almost surely, 2^196039639 is an apocalyptic number.

196039639 is a deficient number, since it is larger than the sum of its proper divisors (1).

196039639 is an equidigital number, since it uses as much as digits as its factorization.

196039639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 196039639 is about 14001.4156070020. The cubic root of 196039639 is about 580.9177296382.

The spelling of 196039639 in words is "one hundred ninety-six million, thirty-nine thousand, six hundred thirty-nine".