682123021 has 8 divisors (see below), whose sum is σ = 687344000. Its totient is φ = 676911600.

The previous prime is 682123019. The next prime is 682123037. The reversal of 682123021 is 120321286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 682123021 - 2¹ = 682123019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682193021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209635 + ... + 212863.

It is an arithmetic number, because the mean of its divisors is an integer number (85918000).

Almost surely, 2^682123021 is an apocalyptic number.

It is an amenable number.

682123021 is a deficient number, since it is larger than the sum of its proper divisors (5220979).

682123021 is a wasteful number, since it uses less digits than its factorization.

682123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4779.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 682123021 is about 26117.4849669718. The cubic root of 682123021 is about 880.2801367940.

The spelling of 682123021 in words is "six hundred eighty-two million, one hundred twenty-three thousand, twenty-one".