68214681 has 12 divisors (see below), whose sum is σ = 98622420. Its totient is φ = 45434880.

The previous prime is 68214661. The next prime is 68214689. The reversal of 68214681 is 18641286.

It can be written as a sum of positive squares in 2 ways, for example, as 11964681 + 56250000 = 3459^2 + 7500^2 .

It is not a de Polignac number, because 68214681 - 2⁹ = 68214169 is a prime.

It is a super-2 number, since 2×68214681² = 9306485407863522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68214689) 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 11 ways as a sum of consecutive naturals, for example, 9465 + ... + 15033.

It is an arithmetic number, because the mean of its divisors is an integer number (8218535).

Almost surely, 2^68214681 is an apocalyptic number.

It is an amenable number.

68214681 is a deficient number, since it is larger than the sum of its proper divisors (30407739).

68214681 is a wasteful number, since it uses less digits than its factorization.

68214681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936 (or 6933 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 68214681 is about 8259.2179411855. The cubic root of 68214681 is about 408.5945951331.

The spelling of 68214681 in words is "sixty-eight million, two hundred fourteen thousand, six hundred eighty-one".