127997489 has 8 divisors (see below), whose sum is σ = 128991360. Its totient is φ = 127007856.

The previous prime is 127997479. The next prime is 127997521. The reversal of 127997489 is 984799721.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127997489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127997479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83282 + ... + 84804.

It is an arithmetic number, because the mean of its divisors is an integer number (16123920).

Almost surely, 2^127997489 is an apocalyptic number.

It is an amenable number.

127997489 is a deficient number, since it is larger than the sum of its proper divisors (993871).

127997489 is a wasteful number, since it uses less digits than its factorization.

127997489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119.

The product of its digits is 2286144, while the sum is 56.

The square root of 127997489 is about 11313.5975268700. The cubic root of 127997489 is about 503.9651244554.

The spelling of 127997489 in words is "one hundred twenty-seven million, nine hundred ninety-seven thousand, four hundred eighty-nine".