684980084 has 6 divisors (see below), whose sum is σ = 1198715154. Its totient is φ = 342490040.

The previous prime is 684980083. The next prime is 684980129. The reversal of 684980084 is 480089486.

It can be written as a sum of positive squares in only one way, i.e., 672883600 + 12096484 = 25940^2 + 3478^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684980083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85622507 + ... + 85622514.

It is an arithmetic number, because the mean of its divisors is an integer number (199785859).

Almost surely, 2^684980084 is an apocalyptic number.

It is an amenable number.

684980084 is a deficient number, since it is larger than the sum of its proper divisors (513735070).

684980084 is a wasteful number, since it uses less digits than its factorization.

684980084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171245025 (or 171245023 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 684980084 is about 26172.1241782168. The cubic root of 684980084 is about 881.5074386683.

The spelling of 684980084 in words is "six hundred eighty-four million, nine hundred eighty thousand, eighty-four".