684457346 has 4 divisors (see below), whose sum is σ = 1026686022. Its totient is φ = 342228672.

The previous prime is 684457309. The next prime is 684457363. The reversal of 684457346 is 643754486.

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., 684084025 + 373321 = 26155^2 + 611^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 684457346.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171114335 + ... + 171114338.

Almost surely, 2^684457346 is an apocalyptic number.

684457346 is a deficient number, since it is larger than the sum of its proper divisors (342228676).

684457346 is a wasteful number, since it uses less digits than its factorization.

684457346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342228675.

The product of its digits is 1935360, while the sum is 47.

The square root of 684457346 is about 26162.1357308611. The cubic root of 684457346 is about 881.2831427537.

The spelling of 684457346 in words is "six hundred eighty-four million, four hundred fifty-seven thousand, three hundred forty-six".