197110261 has 2 divisors, whose sum is σ = 197110262. Its totient is φ = 197110260.

The previous prime is 197110219. The next prime is 197110279. The reversal of 197110261 is 162011791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196840900 + 269361 = 14030^2 + 519^2 .

It is a cyclic number.

It is not a de Polignac number, because 197110261 - 2²¹ = 195013109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197110961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98555130 + 98555131.

It is an arithmetic number, because the mean of its divisors is an integer number (98555131).

Almost surely, 2^197110261 is an apocalyptic number.

It is an amenable number.

197110261 is a deficient number, since it is larger than the sum of its proper divisors (1).

197110261 is an equidigital number, since it uses as much as digits as its factorization.

197110261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 28.

The square root of 197110261 is about 14039.5961836514. The cubic root of 197110261 is about 581.9733231751.

The spelling of 197110261 in words is "one hundred ninety-seven million, one hundred ten thousand, two hundred sixty-one".