30317742857 has 2 divisors, whose sum is σ = 30317742858. Its totient is φ = 30317742856.

The previous prime is 30317742839. The next prime is 30317742887. The reversal of 30317742857 is 75824771303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28270723321 + 2047019536 = 168139^2 + 45244^2 .

It is a cyclic number.

It is not a de Polignac number, because 30317742857 - 2⁸ = 30317742601 is a prime.

It is not a weakly prime, because it can be changed into another prime (30317742887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15158871428 + 15158871429.

It is an arithmetic number, because the mean of its divisors is an integer number (15158871429).

Almost surely, 2^30317742857 is an apocalyptic number.

It is an amenable number.

30317742857 is a deficient number, since it is larger than the sum of its proper divisors (1).

30317742857 is an equidigital number, since it uses as much as digits as its factorization.

30317742857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 30317742857 in words is "thirty billion, three hundred seventeen million, seven hundred forty-two thousand, eight hundred fifty-seven".