127998017 has 4 divisors (see below), whose sum is σ = 146283456. Its totient is φ = 109712580.

The previous prime is 127997993. The next prime is 127998037. The reversal of 127998017 is 710899721.

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 a cyclic number.

It is not a de Polignac number, because 127998017 - 2⁸ = 127997761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127998037) 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, 9142709 + ... + 9142722.

It is an arithmetic number, because the mean of its divisors is an integer number (36570864).

Almost surely, 2^127998017 is an apocalyptic number.

It is an amenable number.

127998017 is a deficient number, since it is larger than the sum of its proper divisors (18285439).

127998017 is an equidigital number, since it uses as much as digits as its factorization.

127998017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18285438.

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 127998017 is about 11313.6208615986. The cubic root of 127998017 is about 503.9658174201.

The spelling of 127998017 in words is "one hundred twenty-seven million, nine hundred ninety-eight thousand, seventeen".