30838984817 has 2 divisors, whose sum is σ = 30838984818. Its totient is φ = 30838984816.

The previous prime is 30838984807. The next prime is 30838984871. The reversal of 30838984817 is 71848983803.

Together with next prime (30838984871) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16610312161 + 14228672656 = 128881^2 + 119284^2 .

It is a cyclic number.

It is not a de Polignac number, because 30838984817 - 2⁶ = 30838984753 is a prime.

It is not a weakly prime, because it can be changed into another prime (30838984807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15419492408 + 15419492409.

It is an arithmetic number, because the mean of its divisors is an integer number (15419492409).

Almost surely, 2^30838984817 is an apocalyptic number.

It is an amenable number.

30838984817 is a deficient number, since it is larger than the sum of its proper divisors (1).

30838984817 is an equidigital number, since it uses as much as digits as its factorization.

30838984817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 30838984817 in words is "thirty billion, eight hundred thirty-eight million, nine hundred eighty-four thousand, eight hundred seventeen".