1943489 has 2 divisors, whose sum is σ = 1943490. Its totient is φ = 1943488.

The previous prime is 1943467. The next prime is 1943531. The reversal of 1943489 is 9843491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1481089 + 462400 = 1217^2 + 680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1943489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1943419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971744 + 971745.

It is an arithmetic number, because the mean of its divisors is an integer number (971745).

2^1943489 is an apocalyptic number.

It is an amenable number.

1943489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1943489 is an equidigital number, since it uses as much as digits as its factorization.

1943489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 1943489 is about 1394.0907431010. The cubic root of 1943489 is about 124.7940930047.

It can be divided in two parts, 194 and 3489, that multiplied together give a triangular number (676866 = T₁₁₆₃).

The spelling of 1943489 in words is "one million, nine hundred forty-three thousand, four hundred eighty-nine".