1966869 has 16 divisors (see below), whose sum is σ = 2947840. Its totient is φ = 1296000.

The previous prime is 1966847. The next prime is 1966871. The reversal of 1966869 is 9686691.

It is not a de Polignac number, because 1966869 - 2¹⁷ = 1835797 is a prime.

It is a super-2 number, since 2×1966869² = 7737147326322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2244 + ... + 2994.

It is an arithmetic number, because the mean of its divisors is an integer number (184240).

2^1966869 is an apocalyptic number.

It is an amenable number.

1966869 is a deficient number, since it is larger than the sum of its proper divisors (980971).

1966869 is an equidigital number, since it uses as much as digits as its factorization.

1966869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 851 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 1966869 is about 1402.4510686651. The cubic root of 1966869 is about 125.2925202546.

The spelling of 1966869 in words is "one million, nine hundred sixty-six thousand, eight hundred sixty-nine".