1689193839 has 16 divisors (see below), whose sum is σ = 2287958400. Its totient is φ = 1108381536.

The previous prime is 1689193837. The next prime is 1689193901. The reversal of 1689193839 is 9383919861.

It is not a de Polignac number, because 1689193839 - 2¹ = 1689193837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689193837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54372 + ... + 79590.

It is an arithmetic number, because the mean of its divisors is an integer number (142997400).

Almost surely, 2^1689193839 is an apocalyptic number.

1689193839 is a deficient number, since it is larger than the sum of its proper divisors (598764561).

1689193839 is a wasteful number, since it uses less digits than its factorization.

1689193839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25574.

The product of its digits is 2519424, while the sum is 57.

The square root of 1689193839 is about 41099.8033936903. The cubic root of 1689193839 is about 1190.9489967803.

The spelling of 1689193839 in words is "one billion, six hundred eighty-nine million, one hundred ninety-three thousand, eight hundred thirty-nine".