1983389 has 2 divisors, whose sum is σ = 1983390. Its totient is φ = 1983388.

The previous prime is 1983383. The next prime is 1983409. The reversal of 1983389 is 9833891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1716100 + 267289 = 1310^2 + 517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1983389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1983383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991694 + 991695.

It is an arithmetic number, because the mean of its divisors is an integer number (991695).

2^1983389 is an apocalyptic number.

It is an amenable number.

1983389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983389 is an equidigital number, since it uses as much as digits as its factorization.

1983389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 1983389 is about 1408.3284418061. The cubic root of 1983389 is about 125.6423256881.

The spelling of 1983389 in words is "one million, nine hundred eighty-three thousand, three hundred eighty-nine".