835216681 has 8 divisors (see below), whose sum is σ = 952374024. Its totient is φ = 725617920.

The previous prime is 835216661. The next prime is 835216691. The reversal of 835216681 is 186612538.

It can be written as a sum of positive squares in 4 ways, for example, as 931225 + 834285456 = 965^2 + 28884^2 .

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 835216681 - 2⁹ = 835216169 is a prime.

It is a super-2 number, since 2×835216681² = 1395173808441311522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (835216661) 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, 1889410 + ... + 1889851.

It is an arithmetic number, because the mean of its divisors is an integer number (119046753).

Almost surely, 2^835216681 is an apocalyptic number.

It is an amenable number.

835216681 is a deficient number, since it is larger than the sum of its proper divisors (117157343).

835216681 is a wasteful number, since it uses less digits than its factorization.

835216681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779291.

The product of its digits is 69120, while the sum is 40.

The square root of 835216681 is about 28900.1155880041. The cubic root of 835216681 is about 941.7444146977.

The spelling of 835216681 in words is "eight hundred thirty-five million, two hundred sixteen thousand, six hundred eighty-one".