197597801 has 2 divisors, whose sum is σ = 197597802. Its totient is φ = 197597800.

The previous prime is 197597779. The next prime is 197597809. The reversal of 197597801 is 108795791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145829776 + 51768025 = 12076^2 + 7195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197597801 is a prime.

It is not a weakly prime, because it can be changed into another prime (197597809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98798900 + 98798901.

It is an arithmetic number, because the mean of its divisors is an integer number (98798901).

Almost surely, 2^197597801 is an apocalyptic number.

It is an amenable number.

197597801 is a deficient number, since it is larger than the sum of its proper divisors (1).

197597801 is an equidigital number, since it uses as much as digits as its factorization.

197597801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 197597801 is about 14056.9484953172. The cubic root of 197597801 is about 582.4527530800.

The spelling of 197597801 in words is "one hundred ninety-seven million, five hundred ninety-seven thousand, eight hundred one".