196985491 has 2 divisors, whose sum is σ = 196985492. Its totient is φ = 196985490.

The previous prime is 196985449. The next prime is 196985513. The reversal of 196985491 is 194589691.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (194589691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196985491 - 2¹⁹ = 196461203 is a prime.

It is a super-2 number, since 2×196985491² = 77606567329022162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (196985401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98492745 + 98492746.

It is an arithmetic number, because the mean of its divisors is an integer number (98492746).

Almost surely, 2^196985491 is an apocalyptic number.

196985491 is a deficient number, since it is larger than the sum of its proper divisors (1).

196985491 is an equidigital number, since it uses as much as digits as its factorization.

196985491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 52.

The square root of 196985491 is about 14035.1519763770. The cubic root of 196985491 is about 581.8505016677.

The spelling of 196985491 in words is "one hundred ninety-six million, nine hundred eighty-five thousand, four hundred ninety-one".