68506387 has 2 divisors, whose sum is σ = 68506388. Its totient is φ = 68506386.

The previous prime is 68506331. The next prime is 68506411. The reversal of 68506387 is 78360586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68506387 - 2¹⁵ = 68473619 is a prime.

It is not a weakly prime, because it can be changed into another prime (68506327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34253193 + 34253194.

It is an arithmetic number, because the mean of its divisors is an integer number (34253194).

Almost surely, 2^68506387 is an apocalyptic number.

68506387 is a deficient number, since it is larger than the sum of its proper divisors (1).

68506387 is an equidigital number, since it uses as much as digits as its factorization.

68506387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 68506387 is about 8276.8585224105. The cubic root of 68506387 is about 409.1761903717.

The spelling of 68506387 in words is "sixty-eight million, five hundred six thousand, three hundred eighty-seven".