1684073689 has 4 divisors (see below), whose sum is σ = 1685923200. Its totient is φ = 1682224180.

The previous prime is 1684073687. The next prime is 1684073789. The reversal of 1684073689 is 9863704861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9863704861 = 17 ⋅580217933.

It is a cyclic number.

It is not a de Polignac number, because 1684073689 - 2¹ = 1684073687 is a prime.

It is a super-2 number, since 2×1684073689² = 5672208379964137442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1684073681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923389 + ... + 925210.

It is an arithmetic number, because the mean of its divisors is an integer number (421480800).

Almost surely, 2^1684073689 is an apocalyptic number.

It is an amenable number.

1684073689 is a deficient number, since it is larger than the sum of its proper divisors (1849511).

1684073689 is an equidigital number, since it uses as much as digits as its factorization.

1684073689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849510.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 1684073689 is about 41037.4668930722. The cubic root of 1684073689 is about 1189.7444756542.

The spelling of 1684073689 in words is "one billion, six hundred eighty-four million, seventy-three thousand, six hundred eighty-nine".