1023839 has 2 divisors, whose sum is σ = 1023840. Its totient is φ = 1023838.

The previous prime is 1023833. The next prime is 1023851. The reversal of 1023839 is 9383201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511919 + 511920.

It is an arithmetic number, because the mean of its divisors is an integer number (511920).

2^1023839 is an apocalyptic number.

1023839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023839 is an equidigital number, since it uses as much as digits as its factorization.

1023839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1023839 is about 1011.8492970794. The cubic root of 1023839 is about 100.7884012332.

The spelling of 1023839 in words is "one million, twenty-three thousand, eight hundred thirty-nine".