1966957 has 4 divisors (see below), whose sum is σ = 2020156. Its totient is φ = 1913760.

The previous prime is 1966933. The next prime is 1966963. The reversal of 1966957 is 7596691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1565001 + 401956 = 1251^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 1966957 - 2¹⁹ = 1442669 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 (1966907) 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 in 3 ways as a sum of consecutive naturals, for example, 26544 + ... + 26617.

It is an arithmetic number, because the mean of its divisors is an integer number (505039).

2^1966957 is an apocalyptic number.

It is an amenable number.

1966957 is a deficient number, since it is larger than the sum of its proper divisors (53199).

1966957 is an equidigital number, since it uses as much as digits as its factorization.

1966957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53198.

The product of its digits is 102060, while the sum is 43.

The square root of 1966957 is about 1402.4824419578. The cubic root of 1966957 is about 125.2943888042.

The spelling of 1966957 in words is "one million, nine hundred sixty-six thousand, nine hundred fifty-seven".