197239937 has 2 divisors, whose sum is σ = 197239938. Its totient is φ = 197239936.

The previous prime is 197239909. The next prime is 197239951. The reversal of 197239937 is 739932791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189310081 + 7929856 = 13759^2 + 2816^2 .

It is a cyclic number.

It is not a de Polignac number, because 197239937 - 2⁸ = 197239681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197239907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98619968 + 98619969.

It is an arithmetic number, because the mean of its divisors is an integer number (98619969).

Almost surely, 2^197239937 is an apocalyptic number.

It is an amenable number.

197239937 is a deficient number, since it is larger than the sum of its proper divisors (1).

197239937 is an equidigital number, since it uses as much as digits as its factorization.

197239937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 642978, while the sum is 50.

The square root of 197239937 is about 14044.2136483322. The cubic root of 197239937 is about 582.1009191520.

The spelling of 197239937 in words is "one hundred ninety-seven million, two hundred thirty-nine thousand, nine hundred thirty-seven".