68143403 has 2 divisors, whose sum is σ = 68143404. Its totient is φ = 68143402.

The previous prime is 68143391. The next prime is 68143447. The reversal of 68143403 is 30434186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68143403 - 2¹² = 68139307 is a prime.

It is not a weakly prime, because it can be changed into another prime (68143483) 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, 34071701 + 34071702.

It is an arithmetic number, because the mean of its divisors is an integer number (34071702).

Almost surely, 2^68143403 is an apocalyptic number.

68143403 is a deficient number, since it is larger than the sum of its proper divisors (1).

68143403 is an equidigital number, since it uses as much as digits as its factorization.

68143403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 68143403 is about 8254.9017559266. The cubic root of 68143403 is about 408.4522310803.

Adding to 68143403 its reverse (30434186), we get a palindrome (98577589).

The spelling of 68143403 in words is "sixty-eight million, one hundred forty-three thousand, four hundred three".