197041261 has 2 divisors, whose sum is σ = 197041262. Its totient is φ = 197041260.

The previous prime is 197041223. The next prime is 197041279. The reversal of 197041261 is 162140791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194044900 + 2996361 = 13930^2 + 1731^2 .

It is a cyclic number.

It is not a de Polignac number, because 197041261 - 2⁷ = 197041133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197041861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98520630 + 98520631.

It is an arithmetic number, because the mean of its divisors is an integer number (98520631).

Almost surely, 2^197041261 is an apocalyptic number.

It is an amenable number.

197041261 is a deficient number, since it is larger than the sum of its proper divisors (1).

197041261 is an equidigital number, since it uses as much as digits as its factorization.

197041261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 197041261 is about 14037.1386329266. The cubic root of 197041261 is about 581.9054071338.

The spelling of 197041261 in words is "one hundred ninety-seven million, forty-one thousand, two hundred sixty-one".