684347673 has 4 divisors (see below), whose sum is σ = 912463568. Its totient is φ = 456231780.

The previous prime is 684347659. The next prime is 684347689. The reversal of 684347673 is 376743486.

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.

It is not a de Polignac number, because 684347673 - 2¹⁸ = 684085529 is a prime.

It is a super-3 number, since 3×684347673³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684347603) 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, 114057943 + ... + 114057948.

It is an arithmetic number, because the mean of its divisors is an integer number (228115892).

Almost surely, 2^684347673 is an apocalyptic number.

It is an amenable number.

684347673 is a deficient number, since it is larger than the sum of its proper divisors (228115895).

684347673 is a wasteful number, since it uses less digits than its factorization.

684347673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228115894.

The product of its digits is 2032128, while the sum is 48.

The square root of 684347673 is about 26160.0396215296. The cubic root of 684347673 is about 881.2360698769.

The spelling of 684347673 in words is "six hundred eighty-four million, three hundred forty-seven thousand, six hundred seventy-three".