68286557 has 2 divisors, whose sum is σ = 68286558. Its totient is φ = 68286556.

The previous prime is 68286553. The next prime is 68286611. The reversal of 68286557 is 75568286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 42436 = 8261^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 68286557 - 2² = 68286553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68286553) 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 as a sum of consecutive naturals, namely, 34143278 + 34143279.

It is an arithmetic number, because the mean of its divisors is an integer number (34143279).

Almost surely, 2^68286557 is an apocalyptic number.

It is an amenable number.

68286557 is a deficient number, since it is larger than the sum of its proper divisors (1).

68286557 is an equidigital number, since it uses as much as digits as its factorization.

68286557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 47.

The square root of 68286557 is about 8263.5680550232. The cubic root of 68286557 is about 408.7380531879.

The spelling of 68286557 in words is "sixty-eight million, two hundred eighty-six thousand, five hundred fifty-seven".