196871641 has 2 divisors, whose sum is σ = 196871642. Its totient is φ = 196871640.

The previous prime is 196871639. The next prime is 196871657. The reversal of 196871641 is 146178691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105267600 + 91604041 = 10260^2 + 9571^2 .

It is a cyclic number.

It is not a de Polignac number, because 196871641 - 2¹ = 196871639 is a prime.

Together with 196871639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (196871671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98435820 + 98435821.

It is an arithmetic number, because the mean of its divisors is an integer number (98435821).

Almost surely, 2^196871641 is an apocalyptic number.

It is an amenable number.

196871641 is a deficient number, since it is larger than the sum of its proper divisors (1).

196871641 is an equidigital number, since it uses as much as digits as its factorization.

196871641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 196871641 is about 14031.0955024902. The cubic root of 196871641 is about 581.7383843649.

The spelling of 196871641 in words is "one hundred ninety-six million, eight hundred seventy-one thousand, six hundred forty-one".