1689139719 has 12 divisors (see below), whose sum is σ = 2457679536. Its totient is φ = 1117872672.

The previous prime is 1689139693. The next prime is 1689139741. The reversal of 1689139719 is 9179319861.

It is a happy number.

1689139719 is a `hidden beast` number, since 168 + 91 + 397 + 1 + 9 = 666.

It is not a de Polignac number, because 1689139719 - 2¹³ = 1689131527 is a prime.

It is a super-2 number, since 2×1689139719² = 5706385980606797922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689139769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 683739 + ... + 686204.

It is an arithmetic number, because the mean of its divisors is an integer number (204806628).

Almost surely, 2^1689139719 is an apocalyptic number.

1689139719 is a deficient number, since it is larger than the sum of its proper divisors (768539817).

1689139719 is a wasteful number, since it uses less digits than its factorization.

1689139719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370086 (or 1370083 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 1689139719 is about 41099.1449911066. The cubic root of 1689139719 is about 1190.9362777253.

The spelling of 1689139719 in words is "one billion, six hundred eighty-nine million, one hundred thirty-nine thousand, seven hundred nineteen".