197061257 has 2 divisors, whose sum is σ = 197061258. Its totient is φ = 197061256.

The previous prime is 197061251. The next prime is 197061283. The reversal of 197061257 is 752160791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147161161 + 49900096 = 12131^2 + 7064^2 .

It is a cyclic number.

It is not a de Polignac number, because 197061257 - 2¹⁰ = 197060233 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197061257.

It is not a weakly prime, because it can be changed into another prime (197061251) 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, 98530628 + 98530629.

It is an arithmetic number, because the mean of its divisors is an integer number (98530629).

Almost surely, 2^197061257 is an apocalyptic number.

It is an amenable number.

197061257 is a deficient number, since it is larger than the sum of its proper divisors (1).

197061257 is an equidigital number, since it uses as much as digits as its factorization.

197061257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 197061257 is about 14037.8508682775. The cubic root of 197061257 is about 581.9250906371.

The spelling of 197061257 in words is "one hundred ninety-seven million, sixty-one thousand, two hundred fifty-seven".