1684493109 has 24 divisors (see below), whose sum is σ = 2627937312. Its totient is φ = 1033598880.

The previous prime is 1684493099. The next prime is 1684493119. The reversal of 1684493109 is 9013944861.

It is an interprime number because it is at equal distance from previous prime (1684493099) and next prime (1684493119).

It is not a de Polignac number, because 1684493109 - 2⁷ = 1684492981 is a prime.

It is a super-3 number, since 3×1684493109³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1684493119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19854 + ... + 61344.

It is an arithmetic number, because the mean of its divisors is an integer number (109497388).

Almost surely, 2^1684493109 is an apocalyptic number.

It is an amenable number.

1684493109 is a deficient number, since it is larger than the sum of its proper divisors (943444203).

1684493109 is a wasteful number, since it uses less digits than its factorization.

1684493109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41857 (or 41854 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1684493109 is about 41042.5767831407. The cubic root of 1684493109 is about 1189.8432364173.

The spelling of 1684493109 in words is "one billion, six hundred eighty-four million, four hundred ninety-three thousand, one hundred nine".