68240413 has 2 divisors, whose sum is σ = 68240414. Its totient is φ = 68240412.

The previous prime is 68240407. The next prime is 68240429. The reversal of 68240413 is 31404286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67864644 + 375769 = 8238^2 + 613^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68240413 is a prime.

It is a super-3 number, since 3×68240413³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68240713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34120206 + 34120207.

It is an arithmetic number, because the mean of its divisors is an integer number (34120207).

Almost surely, 2^68240413 is an apocalyptic number.

It is an amenable number.

68240413 is a deficient number, since it is larger than the sum of its proper divisors (1).

68240413 is an equidigital number, since it uses as much as digits as its factorization.

68240413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 68240413 is about 8260.7755689160. The cubic root of 68240413 is about 408.6459654746.

Adding to 68240413 its reverse (31404286), we get a palindrome (99644699).

The spelling of 68240413 in words is "sixty-eight million, two hundred forty thousand, four hundred thirteen".