684985282 has 4 divisors (see below), whose sum is σ = 1027477926. Its totient is φ = 342492640.

The previous prime is 684985247. The next prime is 684985297. The reversal of 684985282 is 282589486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 282589486 = 2 ⋅141294743.

It can be written as a sum of positive squares in only one way, i.e., 365612641 + 319372641 = 19121^2 + 17871^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171246319 + ... + 171246322.

Almost surely, 2^684985282 is an apocalyptic number.

684985282 is a deficient number, since it is larger than the sum of its proper divisors (342492644).

684985282 is a wasteful number, since it uses less digits than its factorization.

684985282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342492643.

The product of its digits is 2211840, while the sum is 52.

The square root of 684985282 is about 26172.2234821576. The cubic root of 684985282 is about 881.5096684480.

The spelling of 684985282 in words is "six hundred eighty-four million, nine hundred eighty-five thousand, two hundred eighty-two".