196011997 has 2 divisors, whose sum is σ = 196011998. Its totient is φ = 196011996.

The previous prime is 196011979. The next prime is 196012027. The reversal of 196011997 is 799110691.

It is a happy number.

Together with previous prime (196011979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138039001 + 57972996 = 11749^2 + 7614^2 .

It is a cyclic number.

It is not a de Polignac number, because 196011997 - 2⁷ = 196011869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196011097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98005998 + 98005999.

It is an arithmetic number, because the mean of its divisors is an integer number (98005999).

Almost surely, 2^196011997 is an apocalyptic number.

It is an amenable number.

196011997 is a deficient number, since it is larger than the sum of its proper divisors (1).

196011997 is an equidigital number, since it uses as much as digits as its factorization.

196011997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 43.

The square root of 196011997 is about 14000.4284577294. The cubic root of 196011997 is about 580.8904248157.

The spelling of 196011997 in words is "one hundred ninety-six million, eleven thousand, nine hundred ninety-seven".