1966379 has 4 divisors (see below), whose sum is σ = 1970184. Its totient is φ = 1962576.

The previous prime is 1966343. The next prime is 1966381. The reversal of 1966379 is 9736691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9736691 = 523 ⋅18617.

It is a cyclic number.

It is not a de Polignac number, because 1966379 - 2⁸ = 1966123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1966399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977 + ... + 2210.

It is an arithmetic number, because the mean of its divisors is an integer number (492546).

2^1966379 is an apocalyptic number.

1966379 is a deficient number, since it is larger than the sum of its proper divisors (3805).

1966379 is an equidigital number, since it uses as much as digits as its factorization.

1966379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804.

The product of its digits is 61236, while the sum is 41.

The square root of 1966379 is about 1402.2763636316. The cubic root of 1966379 is about 125.2821148109.

The spelling of 1966379 in words is "one million, nine hundred sixty-six thousand, three hundred seventy-nine".