197453561 has 2 divisors, whose sum is σ = 197453562. Its totient is φ = 197453560.

The previous prime is 197453527. The next prime is 197453569. The reversal of 197453561 is 165354791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156250000 + 41203561 = 12500^2 + 6419^2 .

It is a cyclic number.

It is not a de Polignac number, because 197453561 - 2¹⁰ = 197452537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197453569) 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, 98726780 + 98726781.

It is an arithmetic number, because the mean of its divisors is an integer number (98726781).

Almost surely, 2^197453561 is an apocalyptic number.

It is an amenable number.

197453561 is a deficient number, since it is larger than the sum of its proper divisors (1).

197453561 is an equidigital number, since it uses as much as digits as its factorization.

197453561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 197453561 is about 14051.8169999470. The cubic root of 197453561 is about 582.3109946946.

The spelling of 197453561 in words is "one hundred ninety-seven million, four hundred fifty-three thousand, five hundred sixty-one".