1689438365 has 8 divisors (see below), whose sum is σ = 2027978208. Its totient is φ = 1351115920.

The previous prime is 1689438329. The next prime is 1689438383. The reversal of 1689438365 is 5638349861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1689438365 - 2¹⁶ = 1689372829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36731 + ... + 68760.

It is an arithmetic number, because the mean of its divisors is an integer number (253497276).

Almost surely, 2^1689438365 is an apocalyptic number.

It is an amenable number.

1689438365 is a deficient number, since it is larger than the sum of its proper divisors (338539843).

1689438365 is a wasteful number, since it uses less digits than its factorization.

1689438365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108699.

The product of its digits is 3732480, while the sum is 53.

The square root of 1689438365 is about 41102.7780691281. The cubic root of 1689438365 is about 1191.0064608669.

The spelling of 1689438365 in words is "one billion, six hundred eighty-nine million, four hundred thirty-eight thousand, three hundred sixty-five".