30542105917 has 2 divisors, whose sum is σ = 30542105918. Its totient is φ = 30542105916.

The previous prime is 30542105861. The next prime is 30542105981. The reversal of 30542105917 is 71950124503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30343549636 + 198556281 = 174194^2 + 14091^2 .

It is an emirp because it is prime and its reverse (71950124503) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30542105917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30542105017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15271052958 + 15271052959.

It is an arithmetic number, because the mean of its divisors is an integer number (15271052959).

Almost surely, 2^30542105917 is an apocalyptic number.

It is an amenable number.

30542105917 is a deficient number, since it is larger than the sum of its proper divisors (1).

30542105917 is an equidigital number, since it uses as much as digits as its factorization.

30542105917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 30542105917 in words is "thirty billion, five hundred forty-two million, one hundred five thousand, nine hundred seventeen".