68431843 has 4 divisors (see below), whose sum is σ = 69109488. Its totient is φ = 67754200.

The previous prime is 68431807. The next prime is 68431889. The reversal of 68431843 is 34813486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34813486 = 2 ⋅17406743.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68431843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68431343) 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, 338671 + ... + 338872.

It is an arithmetic number, because the mean of its divisors is an integer number (17277372).

Almost surely, 2^68431843 is an apocalyptic number.

68431843 is a deficient number, since it is larger than the sum of its proper divisors (677645).

68431843 is a wasteful number, since it uses less digits than its factorization.

68431843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677644.

The product of its digits is 55296, while the sum is 37.

The square root of 68431843 is about 8272.3541389377. The cubic root of 68431843 is about 409.0277239234.

The spelling of 68431843 in words is "sixty-eight million, four hundred thirty-one thousand, eight hundred forty-three".