1966123 has 2 divisors, whose sum is σ = 1966124. Its totient is φ = 1966122.

The previous prime is 1966079. The next prime is 1966127. The reversal of 1966123 is 3216691.

It is a strong prime.

It is an emirp because it is prime and its reverse (3216691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1966123 - 2¹⁷ = 1835051 is a prime.

It is a super-2 number, since 2×1966123² = 7731279302258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1966091 and 1966100.

It is not a weakly prime, because it can be changed into another prime (1966127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983061 + 983062.

It is an arithmetic number, because the mean of its divisors is an integer number (983062).

2^1966123 is an apocalyptic number.

1966123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966123 is an equidigital number, since it uses as much as digits as its factorization.

1966123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 28.

The square root of 1966123 is about 1402.1850805083. The cubic root of 1966123 is about 125.2766778099.

The spelling of 1966123 in words is "one million, nine hundred sixty-six thousand, one hundred twenty-three".