684173002 has 4 divisors (see below), whose sum is σ = 1026259506. Its totient is φ = 342086500.

The previous prime is 684172999. The next prime is 684173029. The reversal of 684173002 is 200371486.

684173002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 665691601 + 18481401 = 25801^2 + 4299^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171043249 + ... + 171043252.

Almost surely, 2^684173002 is an apocalyptic number.

684173002 is a deficient number, since it is larger than the sum of its proper divisors (342086504).

684173002 is a wasteful number, since it uses less digits than its factorization.

684173002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342086503.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 684173002 is about 26156.7009005341. The cubic root of 684173002 is about 881.1610887479.

The spelling of 684173002 in words is "six hundred eighty-four million, one hundred seventy-three thousand, two".