68272861 has 2 divisors, whose sum is σ = 68272862. Its totient is φ = 68272860.

The previous prime is 68272859. The next prime is 68272891. The reversal of 68272861 is 16827286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61544025 + 6728836 = 7845^2 + 2594^2 .

It is a cyclic number.

It is not a de Polignac number, because 68272861 - 2¹ = 68272859 is a prime.

It is a super-2 number, since 2×68272861² = 9322367098250642, which contains 22 as substring.

Together with 68272859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68272891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34136430 + 34136431.

It is an arithmetic number, because the mean of its divisors is an integer number (34136431).

Almost surely, 2^68272861 is an apocalyptic number.

It is an amenable number.

68272861 is a deficient number, since it is larger than the sum of its proper divisors (1).

68272861 is an equidigital number, since it uses as much as digits as its factorization.

68272861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 68272861 is about 8262.7393157475. The cubic root of 68272861 is about 408.7107249654.

The spelling of 68272861 in words is "sixty-eight million, two hundred seventy-two thousand, eight hundred sixty-one".