68770159 has 2 divisors, whose sum is σ = 68770160. Its totient is φ = 68770158.

The previous prime is 68770157. The next prime is 68770217. The reversal of 68770159 is 95107786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68770159 - 2¹ = 68770157 is a prime.

Together with 68770157, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68770157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34385079 + 34385080.

It is an arithmetic number, because the mean of its divisors is an integer number (34385080).

Almost surely, 2^68770159 is an apocalyptic number.

68770159 is a deficient number, since it is larger than the sum of its proper divisors (1).

68770159 is an equidigital number, since it uses as much as digits as its factorization.

68770159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 68770159 is about 8292.7775202281. Note that the first 3 decimals coincide. The cubic root of 68770159 is about 409.7006718662.

The spelling of 68770159 in words is "sixty-eight million, seven hundred seventy thousand, one hundred fifty-nine".