127997517 has 8 divisors (see below), whose sum is σ = 170716896. Its totient is φ = 85304912.

The previous prime is 127997479. The next prime is 127997521. The reversal of 127997517 is 715799721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127997517 - 2¹⁰ = 127996493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127997557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11638 + ... + 19784.

It is an arithmetic number, because the mean of its divisors is an integer number (21339612).

Almost surely, 2^127997517 is an apocalyptic number.

It is an amenable number.

127997517 is a deficient number, since it is larger than the sum of its proper divisors (42719379).

127997517 is an equidigital number, since it uses as much as digits as its factorization.

127997517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13387.

The product of its digits is 277830, while the sum is 48.

The square root of 127997517 is about 11313.5987643190. The cubic root of 127997517 is about 503.9651612036.

The spelling of 127997517 in words is "one hundred twenty-seven million, nine hundred ninety-seven thousand, five hundred seventeen".