196188397 has 2 divisors, whose sum is σ = 196188398. Its totient is φ = 196188396.

The previous prime is 196188389. The next prime is 196188463. The reversal of 196188397 is 793881691.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174927076 + 21261321 = 13226^2 + 4611^2 .

It is a cyclic number.

It is not a de Polignac number, because 196188397 - 2³ = 196188389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196188197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98094198 + 98094199.

It is an arithmetic number, because the mean of its divisors is an integer number (98094199).

Almost surely, 2^196188397 is an apocalyptic number.

It is an amenable number.

196188397 is a deficient number, since it is larger than the sum of its proper divisors (1).

196188397 is an equidigital number, since it uses as much as digits as its factorization.

196188397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 52.

The square root of 196188397 is about 14006.7268481969. The cubic root of 196188397 is about 581.0646290294.

The spelling of 196188397 in words is "one hundred ninety-six million, one hundred eighty-eight thousand, three hundred ninety-seven".