68487493 has 2 divisors, whose sum is σ = 68487494. Its totient is φ = 68487492.

The previous prime is 68487479. The next prime is 68487521. The reversal of 68487493 is 39478486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63393444 + 5094049 = 7962^2 + 2257^2 .

It is a cyclic number.

It is not a de Polignac number, because 68487493 - 2²¹ = 66390341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68487593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34243746 + 34243747.

It is an arithmetic number, because the mean of its divisors is an integer number (34243747).

Almost surely, 2^68487493 is an apocalyptic number.

It is an amenable number.

68487493 is a deficient number, since it is larger than the sum of its proper divisors (1).

68487493 is an equidigital number, since it uses as much as digits as its factorization.

68487493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 49.

The square root of 68487493 is about 8275.7170686292. The cubic root of 68487493 is about 409.1385701044.

It can be divided in two parts, 6848 and 7493, that added together give a palindrome (14341).

The spelling of 68487493 in words is "sixty-eight million, four hundred eighty-seven thousand, four hundred ninety-three".