1966931 has 2 divisors, whose sum is σ = 1966932. Its totient is φ = 1966930.

The previous prime is 1966907. The next prime is 1966933. The reversal of 1966931 is 1396691.

It is a strong prime.

It is an emirp because it is prime and its reverse (1396691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1966931 is a prime.

It is a super-2 number, since 2×1966931² = 7737635117522, which contains 22 as substring.

Together with 1966933, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1966891 and 1966900.

It is not a weakly prime, because it can be changed into another prime (1966933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983465 + 983466.

It is an arithmetic number, because the mean of its divisors is an integer number (983466).

2^1966931 is an apocalyptic number.

1966931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966931 is an equidigital number, since it uses as much as digits as its factorization.

1966931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 1966931 is about 1402.4731726489. The cubic root of 1966931 is about 125.2938367385.

The spelling of 1966931 in words is "one million, nine hundred sixty-six thousand, nine hundred thirty-one".