168721067 has 2 divisors, whose sum is σ = 168721068. Its totient is φ = 168721066.

The previous prime is 168721037. The next prime is 168721079. The reversal of 168721067 is 760127861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168721067 - 2²² = 164526763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168721067.

It is not a weakly prime, because it can be changed into another prime (168721037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84360533 + 84360534.

It is an arithmetic number, because the mean of its divisors is an integer number (84360534).

Almost surely, 2^168721067 is an apocalyptic number.

168721067 is a deficient number, since it is larger than the sum of its proper divisors (1).

168721067 is an equidigital number, since it uses as much as digits as its factorization.

168721067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 168721067 is about 12989.2673773389. The cubic root of 168721067 is about 552.5731407440.

The spelling of 168721067 in words is "one hundred sixty-eight million, seven hundred twenty-one thousand, sixty-seven".