1968137 has 2 divisors, whose sum is σ = 1968138. Its totient is φ = 1968136.

The previous prime is 1968103. The next prime is 1968139. The reversal of 1968137 is 7318691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1948816 + 19321 = 1396^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968137 - 2¹² = 1964041 is a prime.

Together with 1968139, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1968097 and 1968106.

It is not a weakly prime, because it can be changed into another prime (1968139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984068 + 984069.

It is an arithmetic number, because the mean of its divisors is an integer number (984069).

2^1968137 is an apocalyptic number.

It is an amenable number.

1968137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968137 is an equidigital number, since it uses as much as digits as its factorization.

1968137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 1968137 is about 1402.9030615121. The cubic root of 1968137 is about 125.3194389746.

The spelling of 1968137 in words is "one million, nine hundred sixty-eight thousand, one hundred thirty-seven".