30172017427 has 2 divisors, whose sum is σ = 30172017428. Its totient is φ = 30172017426.

The previous prime is 30172017377. The next prime is 30172017439. The reversal of 30172017427 is 72471027103.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30172017427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30172017392 and 30172017401.

It is not a weakly prime, because it can be changed into another prime (30172011427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15086008713 + 15086008714.

It is an arithmetic number, because the mean of its divisors is an integer number (15086008714).

Almost surely, 2^30172017427 is an apocalyptic number.

30172017427 is a deficient number, since it is larger than the sum of its proper divisors (1).

30172017427 is an equidigital number, since it uses as much as digits as its factorization.

30172017427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16464, while the sum is 34.

The spelling of 30172017427 in words is "thirty billion, one hundred seventy-two million, seventeen thousand, four hundred twenty-seven".