197006549 has 2 divisors, whose sum is σ = 197006550. Its totient is φ = 197006548.

The previous prime is 197006543. The next prime is 197006567. The reversal of 197006549 is 945600791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196840900 + 165649 = 14030^2 + 407^2 .

It is a cyclic number.

It is not a de Polignac number, because 197006549 - 2¹² = 197002453 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197006543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98503274 + 98503275.

It is an arithmetic number, because the mean of its divisors is an integer number (98503275).

Almost surely, 2^197006549 is an apocalyptic number.

It is an amenable number.

197006549 is a deficient number, since it is larger than the sum of its proper divisors (1).

197006549 is an equidigital number, since it uses as much as digits as its factorization.

197006549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 197006549 is about 14035.9021441445. The cubic root of 197006549 is about 581.8712344490.

The spelling of 197006549 in words is "one hundred ninety-seven million, six thousand, five hundred forty-nine".