196805771 has 2 divisors, whose sum is σ = 196805772. Its totient is φ = 196805770.

The previous prime is 196805759. The next prime is 196805773. The reversal of 196805771 is 177508691.

196805771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196805771 is a prime.

It is a super-2 number, since 2×196805771² = 77465022997808882, which contains 22 as substring.

Together with 196805773, 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 (196805773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98402885 + 98402886.

It is an arithmetic number, because the mean of its divisors is an integer number (98402886).

Almost surely, 2^196805771 is an apocalyptic number.

196805771 is a deficient number, since it is larger than the sum of its proper divisors (1).

196805771 is an equidigital number, since it uses as much as digits as its factorization.

196805771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 44.

The square root of 196805771 is about 14028.7480196916. The cubic root of 196805771 is about 581.6734971087.

The spelling of 196805771 in words is "one hundred ninety-six million, eight hundred five thousand, seven hundred seventy-one".