1689042719 has 32 divisors (see below), whose sum is σ = 2167087104. Its totient is φ = 1280499840.

The previous prime is 1689042689. The next prime is 1689042721. The reversal of 1689042719 is 9172409861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689042719 is a prime.

It is a super-2 number, since 2×1689042719² = 5705730613213825922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689042739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287657 + ... + 293469.

It is an arithmetic number, because the mean of its divisors is an integer number (67721472).

Almost surely, 2^1689042719 is an apocalyptic number.

1689042719 is a deficient number, since it is larger than the sum of its proper divisors (478044385).

1689042719 is a wasteful number, since it uses less digits than its factorization.

1689042719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 1689042719 is about 41097.9649009534. The cubic root of 1689042719 is about 1190.9134805130.

The spelling of 1689042719 in words is "one billion, six hundred eighty-nine million, forty-two thousand, seven hundred nineteen".