683201981 has 32 divisors (see below), whose sum is σ = 927590400. Its totient is φ = 486924480.

The previous prime is 683201977. The next prime is 683201989. The reversal of 683201981 is 189102386.

It is not a de Polignac number, because 683201981 - 2² = 683201977 is a prime.

It is a super-2 number, since 2×683201981² = 933529893684648722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683201989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34376 + ... + 50478.

It is an arithmetic number, because the mean of its divisors is an integer number (28987200).

Almost surely, 2^683201981 is an apocalyptic number.

It is an amenable number.

683201981 is a deficient number, since it is larger than the sum of its proper divisors (244388419).

683201981 is a wasteful number, since it uses less digits than its factorization.

683201981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16169.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 683201981 is about 26138.1326991811. The cubic root of 683201981 is about 880.7440251181.

The spelling of 683201981 in words is "six hundred eighty-three million, two hundred one thousand, nine hundred eighty-one".