196972439 has 2 divisors, whose sum is σ = 196972440. Its totient is φ = 196972438.

The previous prime is 196972427. The next prime is 196972471. The reversal of 196972439 is 934279691.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196972439 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 (196972499) 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, 98486219 + 98486220.

It is an arithmetic number, because the mean of its divisors is an integer number (98486220).

Almost surely, 2^196972439 is an apocalyptic number.

196972439 is a deficient number, since it is larger than the sum of its proper divisors (1).

196972439 is an equidigital number, since it uses as much as digits as its factorization.

196972439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 50.

The square root of 196972439 is about 14034.6869933034. The cubic root of 196972439 is about 581.8376505004.

The spelling of 196972439 in words is "one hundred ninety-six million, nine hundred seventy-two thousand, four hundred thirty-nine".