682168538 has 4 divisors (see below), whose sum is σ = 1023252810. Its totient is φ = 341084268.

The previous prime is 682168507. The next prime is 682168541. The reversal of 682168538 is 835861286.

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., 656025769 + 26142769 = 25613^2 + 5113^2 .

It is a junction number, because it is equal to n+sod(n) for n = 682168492 and 682168501.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170542133 + ... + 170542136.

Almost surely, 2^682168538 is an apocalyptic number.

682168538 is a deficient number, since it is larger than the sum of its proper divisors (341084272).

682168538 is a wasteful number, since it uses less digits than its factorization.

682168538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341084271.

The product of its digits is 552960, while the sum is 47.

The square root of 682168538 is about 26118.3563418528. The cubic root of 682168538 is about 880.2997162630.

The spelling of 682168538 in words is "six hundred eighty-two million, one hundred sixty-eight thousand, five hundred thirty-eight".