196618931 has 2 divisors, whose sum is σ = 196618932. Its totient is φ = 196618930.

The previous prime is 196618909. The next prime is 196618963. The reversal of 196618931 is 139816691.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196618931 - 2⁶ = 196618867 is a prime.

It is a super-2 number, since 2×196618931² = 77318008055165522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (196618831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98309465 + 98309466.

It is an arithmetic number, because the mean of its divisors is an integer number (98309466).

Almost surely, 2^196618931 is an apocalyptic number.

196618931 is a deficient number, since it is larger than the sum of its proper divisors (1).

196618931 is an equidigital number, since it uses as much as digits as its factorization.

196618931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 44.

The square root of 196618931 is about 14022.0872554695. The cubic root of 196618931 is about 581.4893658440.

The spelling of 196618931 in words is "one hundred ninety-six million, six hundred eighteen thousand, nine hundred thirty-one".