68143747 has 16 divisors (see below), whose sum is σ = 82978560. Its totient is φ = 54659232.

The previous prime is 68143723. The next prime is 68143781. The reversal of 68143747 is 74734186.

It is a cyclic number.

It is not a de Polignac number, because 68143747 - 2¹¹ = 68141699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68143717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7953 + ... + 14125.

It is an arithmetic number, because the mean of its divisors is an integer number (5186160).

Almost surely, 2^68143747 is an apocalyptic number.

68143747 is a deficient number, since it is larger than the sum of its proper divisors (14834813).

68143747 is a wasteful number, since it uses less digits than its factorization.

68143747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6282.

The product of its digits is 112896, while the sum is 40.

The square root of 68143747 is about 8254.9225920053. The cubic root of 68143747 is about 408.4529183923.

The spelling of 68143747 in words is "sixty-eight million, one hundred forty-three thousand, seven hundred forty-seven".