68671747 has 4 divisors (see below), whose sum is σ = 70132896. Its totient is φ = 67210600.

The previous prime is 68671723. The next prime is 68671753. The reversal of 68671747 is 74717686.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68671747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68671697 and 68671706.

It is not an unprimeable number, because it can be changed into a prime (68671847) 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, 730504 + ... + 730597.

It is an arithmetic number, because the mean of its divisors is an integer number (17533224).

Almost surely, 2^68671747 is an apocalyptic number.

68671747 is a deficient number, since it is larger than the sum of its proper divisors (1461149).

68671747 is a wasteful number, since it uses less digits than its factorization.

68671747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461148.

The product of its digits is 395136, while the sum is 46.

The square root of 68671747 is about 8286.8417989002. The cubic root of 68671747 is about 409.5051475711.

The spelling of 68671747 in words is "sixty-eight million, six hundred seventy-one thousand, seven hundred forty-seven".