1992643 has 2 divisors, whose sum is σ = 1992644. Its totient is φ = 1992642.

The previous prime is 1992637. The next prime is 1992673. The reversal of 1992643 is 3462991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1992643 - 2⁵ = 1992611 is a prime.

It is a super-2 number, since 2×1992643² = 7941252250898, which contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1992599 and 1992608.

It is not a weakly prime, because it can be changed into another prime (1992623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996321 + 996322.

It is an arithmetic number, because the mean of its divisors is an integer number (996322).

2^1992643 is an apocalyptic number.

1992643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992643 is an equidigital number, since it uses as much as digits as its factorization.

1992643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 1992643 is about 1411.6100736393. The cubic root of 1992643 is about 125.8374278548.

The spelling of 1992643 in words is "one million, nine hundred ninety-two thousand, six hundred forty-three".