196771643 has 2 divisors, whose sum is σ = 196771644. Its totient is φ = 196771642.

The previous prime is 196771633. The next prime is 196771691. The reversal of 196771643 is 346177691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196771643 - 2⁶ = 196771579 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 196771594 and 196771603.

It is not a weakly prime, because it can be changed into another prime (196771633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98385821 + 98385822.

It is an arithmetic number, because the mean of its divisors is an integer number (98385822).

Almost surely, 2^196771643 is an apocalyptic number.

196771643 is a deficient number, since it is larger than the sum of its proper divisors (1).

196771643 is an equidigital number, since it uses as much as digits as its factorization.

196771643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 196771643 is about 14027.5316075210. The cubic root of 196771643 is about 581.6398725854.

The spelling of 196771643 in words is "one hundred ninety-six million, seven hundred seventy-one thousand, six hundred forty-three".