196963409 has 2 divisors, whose sum is σ = 196963410. Its totient is φ = 196963408.

The previous prime is 196963397. The next prime is 196963427. The reversal of 196963409 is 904369691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100000000 + 96963409 = 10000^2 + 9847^2 .

It is an emirp because it is prime and its reverse (904369691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196963409 - 2¹⁶ = 196897873 is a prime.

It is not a weakly prime, because it can be changed into another prime (196963439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98481704 + 98481705.

It is an arithmetic number, because the mean of its divisors is an integer number (98481705).

Almost surely, 2^196963409 is an apocalyptic number.

It is an amenable number.

196963409 is a deficient number, since it is larger than the sum of its proper divisors (1).

196963409 is an equidigital number, since it uses as much as digits as its factorization.

196963409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 196963409 is about 14034.3652866811. The cubic root of 196963409 is about 581.8287591139.

The spelling of 196963409 in words is "one hundred ninety-six million, nine hundred sixty-three thousand, four hundred nine".