1684258889 has 4 divisors (see below), whose sum is σ = 1690339524. Its totient is φ = 1678178256.

The previous prime is 1684258883. The next prime is 1684258903. The reversal of 1684258889 is 9888524861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168480400 + 1515778489 = 12980^2 + 38933^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684258889 - 2²⁰ = 1683210313 is a prime.

It is a super-3 number, since 3×1684258889³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1684258883) 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, 3039902 + ... + 3040455.

It is an arithmetic number, because the mean of its divisors is an integer number (422584881).

Almost surely, 2^1684258889 is an apocalyptic number.

It is an amenable number.

1684258889 is a deficient number, since it is larger than the sum of its proper divisors (6080635).

1684258889 is an equidigital number, since it uses as much as digits as its factorization.

1684258889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6080634.

The product of its digits is 8847360, while the sum is 59.

The square root of 1684258889 is about 41039.7233055975. The cubic root of 1684258889 is about 1189.7880866913.

The spelling of 1684258889 in words is "one billion, six hundred eighty-four million, two hundred fifty-eight thousand, eight hundred eighty-nine".