196555787 has 2 divisors, whose sum is σ = 196555788. Its totient is φ = 196555786.

The previous prime is 196555759. The next prime is 196555811. The reversal of 196555787 is 787555691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196555787 - 2¹⁶ = 196490251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (196555757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98277893 + 98277894.

It is an arithmetic number, because the mean of its divisors is an integer number (98277894).

Almost surely, 2^196555787 is an apocalyptic number.

196555787 is a deficient number, since it is larger than the sum of its proper divisors (1).

196555787 is an equidigital number, since it uses as much as digits as its factorization.

196555787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646000, while the sum is 53.

The square root of 196555787 is about 14019.8354840562. The cubic root of 196555787 is about 581.4271109099.

The spelling of 196555787 in words is "one hundred ninety-six million, five hundred fifty-five thousand, seven hundred eighty-seven".