682907981 has 16 divisors (see below), whose sum is σ = 791347200. Its totient is φ = 577216368.

The previous prime is 682907957. The next prime is 682907987. The reversal of 682907981 is 189709286.

It is a cyclic number.

It is not a de Polignac number, because 682907981 - 2¹⁰ = 682906957 is a prime.

It is a super-2 number, since 2×682907981² = 932726621026992722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682907987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533300 + ... + 534578.

It is an arithmetic number, because the mean of its divisors is an integer number (49459200).

Almost surely, 2^682907981 is an apocalyptic number.

It is an amenable number.

682907981 is a deficient number, since it is larger than the sum of its proper divisors (108439219).

682907981 is a wasteful number, since it uses less digits than its factorization.

682907981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 682907981 is about 26132.5081268523. The cubic root of 682907981 is about 880.6176711251.

The spelling of 682907981 in words is "six hundred eighty-two million, nine hundred seven thousand, nine hundred eighty-one".