1968997 has 2 divisors, whose sum is σ = 1968998. Its totient is φ = 1968996.

The previous prime is 1968983. The next prime is 1969001. The reversal of 1968997 is 7998691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1865956 + 103041 = 1366^2 + 321^2 .

It is an emirp because it is prime and its reverse (7998691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1968997 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1968997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984498 + 984499.

It is an arithmetic number, because the mean of its divisors is an integer number (984499).

2^1968997 is an apocalyptic number.

It is an amenable number.

1968997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968997 is an equidigital number, since it uses as much as digits as its factorization.

1968997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 49.

The square root of 1968997 is about 1403.2095353154. The cubic root of 1968997 is about 125.3376895712.

The spelling of 1968997 in words is "one million, nine hundred sixty-eight thousand, nine hundred ninety-seven".