82681001 has 8 divisors (see below), whose sum is σ = 92111880. Its totient is φ = 73688832.

The previous prime is 82680971. The next prime is 82681009. The reversal of 82681001 is 10018628.

It can be written as a sum of positive squares in 4 ways, for example, as 23775376 + 58905625 = 4876^2 + 7675^2 .

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 82681001 - 2¹⁰ = 82679977 is a prime.

It is a super-2 number, since 2×82681001² = 13672295852724002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82681009) 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, 109280 + ... + 110033.

It is an arithmetic number, because the mean of its divisors is an integer number (11513985).

Almost surely, 2^82681001 is an apocalyptic number.

It is an amenable number.

82681001 is a deficient number, since it is larger than the sum of its proper divisors (9430879).

82681001 is a wasteful number, since it uses less digits than its factorization.

82681001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219355.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 82681001 is about 9092.9093803909. The cubic root of 82681001 is about 435.6475158714.

Adding to 82681001 its reverse (10018628), we get a palindrome (92699629).

The spelling of 82681001 in words is "eighty-two million, six hundred eighty-one thousand, one".