196872217 has 2 divisors, whose sum is σ = 196872218. Its totient is φ = 196872216.

The previous prime is 196872211. The next prime is 196872229. The reversal of 196872217 is 712278691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142348761 + 54523456 = 11931^2 + 7384^2 .

It is a cyclic number.

It is not a de Polignac number, because 196872217 - 2³ = 196872209 is a prime.

It is not a weakly prime, because it can be changed into another prime (196872211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98436108 + 98436109.

It is an arithmetic number, because the mean of its divisors is an integer number (98436109).

Almost surely, 2^196872217 is an apocalyptic number.

It is an amenable number.

196872217 is a deficient number, since it is larger than the sum of its proper divisors (1).

196872217 is an equidigital number, since it uses as much as digits as its factorization.

196872217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 196872217 is about 14031.1160283136. The cubic root of 196872217 is about 581.7389517075.

It can be divided in two parts, 19687 and 2217, that added together give a square (21904 = 148²).

The spelling of 196872217 in words is "one hundred ninety-six million, eight hundred seventy-two thousand, two hundred seventeen".