68403943 has 4 divisors (see below), whose sum is σ = 68424160. Its totient is φ = 68383728.

The previous prime is 68403917. The next prime is 68403947. The reversal of 68403943 is 34930486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34930486 = 2 ⋅17465243.

It is a cyclic number.

It is not a de Polignac number, because 68403943 - 2⁵ = 68403911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68403947) 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 in 3 ways as a sum of consecutive naturals, for example, 3663 + ... + 12256.

It is an arithmetic number, because the mean of its divisors is an integer number (17106040).

Almost surely, 2^68403943 is an apocalyptic number.

68403943 is a deficient number, since it is larger than the sum of its proper divisors (20217).

68403943 is a wasteful number, since it uses less digits than its factorization.

68403943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20216.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 68403943 is about 8270.6676272233. The cubic root of 68403943 is about 408.9721288269.

The spelling of 68403943 in words is "sixty-eight million, four hundred three thousand, nine hundred forty-three".