68098681 has 6 divisors (see below), whose sum is σ = 79216890. Its totient is φ = 58370256.

The previous prime is 68098669. The next prime is 68098721. The reversal of 68098681 is 18689086.

It can be written as a sum of positive squares in only one way, i.e., 45441081 + 22657600 = 6741^2 + 4760^2 .

It is not a de Polignac number, because 68098681 - 2⁵ = 68098649 is a prime.

It is a super-2 number, since 2×68098681² = 9274860707879522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68098781) 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 5 ways as a sum of consecutive naturals, for example, 694836 + ... + 694933.

It is an arithmetic number, because the mean of its divisors is an integer number (13202815).

Almost surely, 2^68098681 is an apocalyptic number.

It is an amenable number.

68098681 is a deficient number, since it is larger than the sum of its proper divisors (11118209).

68098681 is a wasteful number, since it uses less digits than its factorization.

68098681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389783 (or 1389776 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The square root of 68098681 is about 8252.1924965430. The cubic root of 68098681 is about 408.3628568222.

The spelling of 68098681 in words is "sixty-eight million, ninety-eight thousand, six hundred eighty-one".