197986049 has 2 divisors, whose sum is σ = 197986050. Its totient is φ = 197986048.

The previous prime is 197986013. The next prime is 197986067. The reversal of 197986049 is 940689791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144769024 + 53217025 = 12032^2 + 7295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197986049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (197986069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98993024 + 98993025.

It is an arithmetic number, because the mean of its divisors is an integer number (98993025).

Almost surely, 2^197986049 is an apocalyptic number.

It is an amenable number.

197986049 is a deficient number, since it is larger than the sum of its proper divisors (1).

197986049 is an equidigital number, since it uses as much as digits as its factorization.

197986049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 197986049 is about 14070.7515435388. The cubic root of 197986049 is about 582.8339789332.

The spelling of 197986049 in words is "one hundred ninety-seven million, nine hundred eighty-six thousand, forty-nine".