197173901 has 2 divisors, whose sum is σ = 197173902. Its totient is φ = 197173900.

The previous prime is 197173861. The next prime is 197173931. The reversal of 197173901 is 109371791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186349801 + 10824100 = 13651^2 + 3290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197173901 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 (197173931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98586950 + 98586951.

It is an arithmetic number, because the mean of its divisors is an integer number (98586951).

Almost surely, 2^197173901 is an apocalyptic number.

It is an amenable number.

197173901 is a deficient number, since it is larger than the sum of its proper divisors (1).

197173901 is an equidigital number, since it uses as much as digits as its factorization.

197173901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 38.

The square root of 197173901 is about 14041.8624476955. The cubic root of 197173901 is about 582.0359493703.

The spelling of 197173901 in words is "one hundred ninety-seven million, one hundred seventy-three thousand, nine hundred one".