197439239 has 2 divisors, whose sum is σ = 197439240. Its totient is φ = 197439238.

The previous prime is 197439223. The next prime is 197439247. The reversal of 197439239 is 932934791.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197439239 - 2⁴ = 197439223 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 197439193 and 197439202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197439259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98719619 + 98719620.

It is an arithmetic number, because the mean of its divisors is an integer number (98719620).

Almost surely, 2^197439239 is an apocalyptic number.

197439239 is a deficient number, since it is larger than the sum of its proper divisors (1).

197439239 is an equidigital number, since it uses as much as digits as its factorization.

197439239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 47.

The square root of 197439239 is about 14051.3073768956. The cubic root of 197439239 is about 582.2969153339.

It can be divided in two parts, 19743 and 9239, that added together give a palindrome (28982).

The spelling of 197439239 in words is "one hundred ninety-seven million, four hundred thirty-nine thousand, two hundred thirty-nine".