196231858309 has 2 divisors, whose sum is σ = 196231858310. Its totient is φ = 196231858308.

The previous prime is 196231858289. The next prime is 196231858337. The reversal of 196231858309 is 903858132691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158366590209 + 37865268100 = 397953^2 + 194590^2 .

It is a cyclic number.

It is not a de Polignac number, because 196231858309 - 2⁷ = 196231858181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196231858309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196231858609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98115929154 + 98115929155.

It is an arithmetic number, because the mean of its divisors is an integer number (98115929155).

Almost surely, 2^196231858309 is an apocalyptic number.

It is an amenable number.

196231858309 is a deficient number, since it is larger than the sum of its proper divisors (1).

196231858309 is an equidigital number, since it uses as much as digits as its factorization.

196231858309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 196231858309 in words is "one hundred ninety-six billion, two hundred thirty-one million, eight hundred fifty-eight thousand, three hundred nine".