196502989 has 2 divisors, whose sum is σ = 196502990. Its totient is φ = 196502988.

The previous prime is 196502987. The next prime is 196503059. The reversal of 196502989 is 989205691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142993764 + 53509225 = 11958^2 + 7315^2 .

It is a cyclic number.

It is not a de Polignac number, because 196502989 - 2¹ = 196502987 is a prime.

It is a super-2 number, since 2×196502989² = 77226849371868242, which contains 22 as substring.

Together with 196502987, 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 (196502987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98251494 + 98251495.

It is an arithmetic number, because the mean of its divisors is an integer number (98251495).

Almost surely, 2^196502989 is an apocalyptic number.

It is an amenable number.

196502989 is a deficient number, since it is larger than the sum of its proper divisors (1).

196502989 is an equidigital number, since it uses as much as digits as its factorization.

196502989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 196502989 is about 14017.9523825700. The cubic root of 196502989 is about 581.3750460684.

The spelling of 196502989 in words is "one hundred ninety-six million, five hundred two thousand, nine hundred eighty-nine".