127993011009 has 4 divisors (see below), whose sum is σ = 170657348016. Its totient is φ = 85328674004.

The previous prime is 127993011007. The next prime is 127993011011. The reversal of 127993011009 is 900110399721.

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.

It is an interprime number because it is at equal distance from previous prime (127993011007) and next prime (127993011011).

It is a cyclic number.

It is not a de Polignac number, because 127993011009 - 2¹ = 127993011007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127993011001) 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, 21332168499 + ... + 21332168504.

It is an arithmetic number, because the mean of its divisors is an integer number (42664337004).

Almost surely, 2^127993011009 is an apocalyptic number.

It is an amenable number.

127993011009 is a deficient number, since it is larger than the sum of its proper divisors (42664337007).

127993011009 is an equidigital number, since it uses as much as digits as its factorization.

127993011009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42664337006.

The product of its (nonzero) digits is 30618, while the sum is 42.

The spelling of 127993011009 in words is "one hundred twenty-seven billion, nine hundred ninety-three million, eleven thousand, nine".