1966693 has 8 divisors (see below), whose sum is σ = 2064600. Its totient is φ = 1870848.

The previous prime is 1966681. The next prime is 1966697. The reversal of 1966693 is 3966691.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26244 + 1940449 = 162^2 + 1393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1966693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653 + ... + 2581.

It is an arithmetic number, because the mean of its divisors is an integer number (258075).

2^1966693 is an apocalyptic number.

It is an amenable number.

1966693 is a deficient number, since it is larger than the sum of its proper divisors (97907).

1966693 is an equidigital number, since it uses as much as digits as its factorization.

1966693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031.

The product of its digits is 52488, while the sum is 40.

The square root of 1966693 is about 1402.3883199742. The cubic root of 1966693 is about 125.2887829880.

It can be divided in two parts, 196 and 6693, that added together give a square (6889 = 83²).

The spelling of 1966693 in words is "one million, nine hundred sixty-six thousand, six hundred ninety-three".