509708678147 has 2 divisors, whose sum is σ = 509708678148. Its totient is φ = 509708678146.

The previous prime is 509708678131. The next prime is 509708678159. The reversal of 509708678147 is 741876807905.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509708678147 - 2⁴ = 509708678131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 509708678147.

It is not a weakly prime, because it can be changed into another prime (509708678117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254854339073 + 254854339074.

It is an arithmetic number, because the mean of its divisors is an integer number (254854339074).

Almost surely, 2^509708678147 is an apocalyptic number.

509708678147 is a deficient number, since it is larger than the sum of its proper divisors (1).

509708678147 is an equidigital number, since it uses as much as digits as its factorization.

509708678147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23708160, while the sum is 62.

The spelling of 509708678147 in words is "five hundred nine billion, seven hundred eight million, six hundred seventy-eight thousand, one hundred forty-seven".