1038689 has 2 divisors, whose sum is σ = 1038690. Its totient is φ = 1038688.

The previous prime is 1038671. The next prime is 1038691. The reversal of 1038689 is 9868301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030225 + 8464 = 1015^2 + 92^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1038689 is a prime.

Together with 1038691, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (1038619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519344 + 519345.

It is an arithmetic number, because the mean of its divisors is an integer number (519345).

2^1038689 is an apocalyptic number.

It is an amenable number.

1038689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1038689 is an equidigital number, since it uses as much as digits as its factorization.

1038689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1038689 is about 1019.1609293924. The cubic root of 1038689 is about 101.2733503022.

The spelling of 1038689 in words is "one million, thirty-eight thousand, six hundred eighty-nine".