196996861 has 2 divisors, whose sum is σ = 196996862. Its totient is φ = 196996860.

The previous prime is 196996859. The next prime is 196996897. The reversal of 196996861 is 168699691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194072761 + 2924100 = 13931^2 + 1710^2 .It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 198966961 and 169669891.

It is a cyclic number.

It is not a de Polignac number, because 196996861 - 2¹ = 196996859 is a prime.

Together with 196996859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196996801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98498430 + 98498431.

It is an arithmetic number, because the mean of its divisors is an integer number (98498431).

Almost surely, 2^196996861 is an apocalyptic number.

It is an amenable number.

196996861 is a deficient number, since it is larger than the sum of its proper divisors (1).

196996861 is an equidigital number, since it uses as much as digits as its factorization.

196996861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 55.

The square root of 196996861 is about 14035.5570249278. The cubic root of 196996861 is about 581.8616962535.

The spelling of 196996861 in words is "one hundred ninety-six million, nine hundred ninety-six thousand, eight hundred sixty-one".