68287277 has 2 divisors, whose sum is σ = 68287278. Its totient is φ = 68287276.

The previous prime is 68287231. The next prime is 68287279. The reversal of 68287277 is 77278286.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63138916 + 5148361 = 7946^2 + 2269^2 .

It is a cyclic number.

It is not a de Polignac number, because 68287277 - 2¹² = 68283181 is a prime.

Together with 68287279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68287279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34143638 + 34143639.

It is an arithmetic number, because the mean of its divisors is an integer number (34143639).

Almost surely, 2^68287277 is an apocalyptic number.

It is an amenable number.

68287277 is a deficient number, since it is larger than the sum of its proper divisors (1).

68287277 is an equidigital number, since it uses as much as digits as its factorization.

68287277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 526848, while the sum is 47.

The square root of 68287277 is about 8263.6116196249. The cubic root of 68287277 is about 408.7394897340.

The spelling of 68287277 in words is "sixty-eight million, two hundred eighty-seven thousand, two hundred seventy-seven".