1684073289 has 4 divisors (see below), whose sum is σ = 2245431056. Its totient is φ = 1122715524.

The previous prime is 1684073269. The next prime is 1684073323. The reversal of 1684073289 is 9823704861.

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: 9823704861 = 3 ⋅3274568287.

It is not a de Polignac number, because 1684073289 - 2⁷ = 1684073161 is a prime.

It is a super-2 number, since 2×1684073289² = 5672205685446555042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1684073269) 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, 280678879 + ... + 280678884.

It is an arithmetic number, because the mean of its divisors is an integer number (561357764).

Almost surely, 2^1684073289 is an apocalyptic number.

It is an amenable number.

1684073289 is a deficient number, since it is larger than the sum of its proper divisors (561357767).

1684073289 is an equidigital number, since it uses as much as digits as its factorization.

1684073289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561357766.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1684073289 is about 41037.4620194768. The cubic root of 1684073289 is about 1189.7443814584.

The spelling of 1684073289 in words is "one billion, six hundred eighty-four million, seventy-three thousand, two hundred eighty-nine".