1966423 has 8 divisors (see below), whose sum is σ = 2046080. Its totient is φ = 1887840.

The previous prime is 1966417. The next prime is 1966427. The reversal of 1966423 is 3246691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1966423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a d-powerful number, because it can be written as 1 + 9⁴ + 6⁷ + 6⁸ + 4³ + 2 + 3⁵ .

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966427) 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, 6961 + ... + 7237.

It is an arithmetic number, because the mean of its divisors is an integer number (255760).

2^1966423 is an apocalyptic number.

1966423 is a deficient number, since it is larger than the sum of its proper divisors (79657).

1966423 is a wasteful number, since it uses less digits than its factorization.

1966423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537.

The product of its digits is 7776, while the sum is 31.

The square root of 1966423 is about 1402.2920523201. The cubic root of 1966423 is about 125.2830492479.

The spelling of 1966423 in words is "one million, nine hundred sixty-six thousand, four hundred twenty-three".