68713643 has 4 divisors (see below), whose sum is σ = 72755640. Its totient is φ = 64671648.

The previous prime is 68713637. The next prime is 68713649. The reversal of 68713643 is 34631786.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68713637) and next prime (68713649).

It is a cyclic number.

It is not a de Polignac number, because 68713643 - 2¹⁸ = 68451499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68713597 and 68713606.

It is not an unprimeable number, because it can be changed into a prime (68713649) 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, 2020973 + ... + 2021006.

It is an arithmetic number, because the mean of its divisors is an integer number (18188910).

Almost surely, 2^68713643 is an apocalyptic number.

68713643 is a deficient number, since it is larger than the sum of its proper divisors (4041997).

68713643 is a wasteful number, since it uses less digits than its factorization.

68713643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041996.

The product of its digits is 72576, while the sum is 38.

The square root of 68713643 is about 8289.3692763684. The cubic root of 68713643 is about 409.5884090799.

The spelling of 68713643 in words is "sixty-eight million, seven hundred thirteen thousand, six hundred forty-three".