68056543 has 4 divisors (see below), whose sum is σ = 68432728. Its totient is φ = 67680360.

The previous prime is 68056511. The next prime is 68056567. The reversal of 68056543 is 34565086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34565086 = 2 ⋅17282543.

It is a cyclic number.

It is not a de Polignac number, because 68056543 - 2⁵ = 68056511 is a prime.

It is a super-2 number, since 2×68056543² = 9263386090221698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68056343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187821 + ... + 188182.

It is an arithmetic number, because the mean of its divisors is an integer number (17108182).

Almost surely, 2^68056543 is an apocalyptic number.

68056543 is a deficient number, since it is larger than the sum of its proper divisors (376185).

68056543 is a wasteful number, since it uses less digits than its factorization.

68056543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376184.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 68056543 is about 8249.6389617971. The cubic root of 68056543 is about 408.2786107240.

The spelling of 68056543 in words is "sixty-eight million, fifty-six thousand, five hundred forty-three".