684744119 has 8 divisors (see below), whose sum is σ = 687570000. Its totient is φ = 681924672.

The previous prime is 684744091. The next prime is 684744131. The reversal of 684744119 is 911447486.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 684744119 - 2²⁴ = 667966903 is a prime.

It is a super-2 number, since 2×684744119² = 937749017010172322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 684744119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684744149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350357 + ... + 352305.

It is an arithmetic number, because the mean of its divisors is an integer number (85946250).

Almost surely, 2^684744119 is an apocalyptic number.

684744119 is a deficient number, since it is larger than the sum of its proper divisors (2825881).

684744119 is a wasteful number, since it uses less digits than its factorization.

684744119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217.

The product of its digits is 193536, while the sum is 44.

The square root of 684744119 is about 26167.6158447804. The cubic root of 684744119 is about 881.4062051692.

The spelling of 684744119 in words is "six hundred eighty-four million, seven hundred forty-four thousand, one hundred nineteen".