68931543 has 16 divisors (see below), whose sum is σ = 93733376. Its totient is φ = 45048960.

The previous prime is 68931539. The next prime is 68931547. The reversal of 68931543 is 34513986.

It is an interprime number because it is at equal distance from previous prime (68931539) and next prime (68931547).

It is not a de Polignac number, because 68931543 - 2² = 68931539 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 (68931547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47730 + ... + 49152.

It is an arithmetic number, because the mean of its divisors is an integer number (5858336).

Almost surely, 2^68931543 is an apocalyptic number.

68931543 is a deficient number, since it is larger than the sum of its proper divisors (24801833).

68931543 is a wasteful number, since it uses less digits than its factorization.

68931543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734.

The product of its digits is 77760, while the sum is 39.

The square root of 68931543 is about 8302.5022131885. The cubic root of 68931543 is about 410.0209051407.

The spelling of 68931543 in words is "sixty-eight million, nine hundred thirty-one thousand, five hundred forty-three".