682350721 has 8 divisors (see below), whose sum is σ = 735293160. Its totient is φ = 629473152.

The previous prime is 682350701. The next prime is 682350749. The reversal of 682350721 is 127053286.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 45495025 + 636855696 = 6745^2 + 25236^2 .

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 682350721 - 2⁷ = 682350593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (682350701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6861 + ... + 37573.

It is an arithmetic number, because the mean of its divisors is an integer number (91911645).

Almost surely, 2^682350721 is an apocalyptic number.

It is an amenable number.

682350721 is a deficient number, since it is larger than the sum of its proper divisors (52942439).

682350721 is a wasteful number, since it uses less digits than its factorization.

682350721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32435.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 682350721 is about 26121.8437519253. The cubic root of 682350721 is about 880.3780748893.

The spelling of 682350721 in words is "six hundred eighty-two million, three hundred fifty thousand, seven hundred twenty-one".