30438172123 has 2 divisors, whose sum is σ = 30438172124. Its totient is φ = 30438172122.

The previous prime is 30438172117. The next prime is 30438172181. The reversal of 30438172123 is 32127183403.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30438172123 - 2⁵ = 30438172091 is a prime.

It is not a weakly prime, because it can be changed into another prime (30433172123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15219086061 + 15219086062.

It is an arithmetic number, because the mean of its divisors is an integer number (15219086062).

Almost surely, 2^30438172123 is an apocalyptic number.

30438172123 is a deficient number, since it is larger than the sum of its proper divisors (1).

30438172123 is an equidigital number, since it uses as much as digits as its factorization.

30438172123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 30438172123 in words is "thirty billion, four hundred thirty-eight million, one hundred seventy-two thousand, one hundred twenty-three".