1966697 has 2 divisors, whose sum is σ = 1966698. Its totient is φ = 1966696.

The previous prime is 1966681. The next prime is 1966787. The reversal of 1966697 is 7966691.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1907161 + 59536 = 1381^2 + 244^2 .

It is an emirp because it is prime and its reverse (7966691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1966697 - 2⁴ = 1966681 is a prime.

It is a Chen prime.

It is a plaindrome in base 11.

It is not a weakly prime, because it can be changed into another prime (1966607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983348 + 983349.

It is an arithmetic number, because the mean of its divisors is an integer number (983349).

2^1966697 is an apocalyptic number.

It is an amenable number.

1966697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966697 is an equidigital number, since it uses as much as digits as its factorization.

1966697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 1966697 is about 1402.3897461120. The cubic root of 1966697 is about 125.2888679283.

The spelling of 1966697 in words is "one million, nine hundred sixty-six thousand, six hundred ninety-seven".