197387249 has 2 divisors, whose sum is σ = 197387250. Its totient is φ = 197387248.

The previous prime is 197387189. The next prime is 197387327. The reversal of 197387249 is 942783791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128414224 + 68973025 = 11332^2 + 8305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197387249 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 197387197 and 197387206.

It is not a weakly prime, because it can be changed into another prime (197387149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98693624 + 98693625.

It is an arithmetic number, because the mean of its divisors is an integer number (98693625).

Almost surely, 2^197387249 is an apocalyptic number.

It is an amenable number.

197387249 is a deficient number, since it is larger than the sum of its proper divisors (1).

197387249 is an equidigital number, since it uses as much as digits as its factorization.

197387249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 197387249 is about 14049.4572493033. The cubic root of 197387249 is about 582.2458004113.

The spelling of 197387249 in words is "one hundred ninety-seven million, three hundred eighty-seven thousand, two hundred forty-nine".