1728878147 has 2 divisors, whose sum is σ = 1728878148. Its totient is φ = 1728878146.

The previous prime is 1728878143. The next prime is 1728878159. The reversal of 1728878147 is 7418788271.

It is a weak prime.

It is an emirp because it is prime and its reverse (7418788271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1728878147 - 2² = 1728878143 is a prime.

It is not a weakly prime, because it can be changed into another prime (1728878143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864439073 + 864439074.

It is an arithmetic number, because the mean of its divisors is an integer number (864439074).

Almost surely, 2^1728878147 is an apocalyptic number.

1728878147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1728878147 is an equidigital number, since it uses as much as digits as its factorization.

1728878147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1404928, while the sum is 53.

The square root of 1728878147 is about 41579.7805068762. The cubic root of 1728878147 is about 1200.2032403444.

The spelling of 1728878147 in words is "one billion, seven hundred twenty-eight million, eight hundred seventy-eight thousand, one hundred forty-seven".