68591287 has 2 divisors, whose sum is σ = 68591288. Its totient is φ = 68591286.

The previous prime is 68591261. The next prime is 68591291. The reversal of 68591287 is 78219586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68591287 - 2¹¹ = 68589239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68592287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34295643 + 34295644.

It is an arithmetic number, because the mean of its divisors is an integer number (34295644).

Almost surely, 2^68591287 is an apocalyptic number.

68591287 is a deficient number, since it is larger than the sum of its proper divisors (1).

68591287 is an equidigital number, since it uses as much as digits as its factorization.

68591287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 68591287 is about 8281.9856918495. The cubic root of 68591287 is about 409.3451513462.

The spelling of 68591287 in words is "sixty-eight million, five hundred ninety-one thousand, two hundred eighty-seven".