196538761 has 2 divisors, whose sum is σ = 196538762. Its totient is φ = 196538760.

The previous prime is 196538759. The next prime is 196538779. The reversal of 196538761 is 167835691.

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., 196532361 + 6400 = 14019^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 196538761 - 2¹ = 196538759 is a prime.

Together with 196538759, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (196538701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98269380 + 98269381.

It is an arithmetic number, because the mean of its divisors is an integer number (98269381).

Almost surely, 2^196538761 is an apocalyptic number.

It is an amenable number.

196538761 is a deficient number, since it is larger than the sum of its proper divisors (1).

196538761 is an equidigital number, since it uses as much as digits as its factorization.

196538761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 196538761 is about 14019.2282597866. The cubic root of 196538761 is about 581.4103223533.

The spelling of 196538761 in words is "one hundred ninety-six million, five hundred thirty-eight thousand, seven hundred sixty-one".