30129127993 has 4 divisors (see below), whose sum is σ = 30510509440. Its totient is φ = 29747746548.

The previous prime is 30129127981. The next prime is 30129127997. The reversal of 30129127993 is 39972192103.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39972192103 = 1721 ⋅23226143.

It is a cyclic number.

It is not a de Polignac number, because 30129127993 - 2⁵ = 30129127961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30129127997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190690605 + ... + 190690762.

It is an arithmetic number, because the mean of its divisors is an integer number (7627627360).

Almost surely, 2^30129127993 is an apocalyptic number.

It is an amenable number.

30129127993 is a deficient number, since it is larger than the sum of its proper divisors (381381447).

30129127993 is an equidigital number, since it uses as much as digits as its factorization.

30129127993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381381446.

The product of its (nonzero) digits is 183708, while the sum is 46.

The spelling of 30129127993 in words is "thirty billion, one hundred twenty-nine million, one hundred twenty-seven thousand, nine hundred ninety-three".