197708939 has 2 divisors, whose sum is σ = 197708940. Its totient is φ = 197708938.

The previous prime is 197708923. The next prime is 197708983. The reversal of 197708939 is 939807791.

197708939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197708939 - 2⁴ = 197708923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197708909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98854469 + 98854470.

It is an arithmetic number, because the mean of its divisors is an integer number (98854470).

Almost surely, 2^197708939 is an apocalyptic number.

197708939 is a deficient number, since it is larger than the sum of its proper divisors (1).

197708939 is an equidigital number, since it uses as much as digits as its factorization.

197708939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 53.

The square root of 197708939 is about 14060.9010735443. The cubic root of 197708939 is about 582.5619319294.

The spelling of 197708939 in words is "one hundred ninety-seven million, seven hundred eight thousand, nine hundred thirty-nine".