127489981 has 8 divisors (see below), whose sum is σ = 134683200. Its totient is φ = 120345120.

The previous prime is 127489979. The next prime is 127490087. The reversal of 127489981 is 189984721.

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 127489981 - 2¹ = 127489979 is a prime.

It is a super-2 number, since 2×127489981² = 32507390510760722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127489931) 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, 6601 + ... + 17278.

It is an arithmetic number, because the mean of its divisors is an integer number (16835400).

Almost surely, 2^127489981 is an apocalyptic number.

It is an amenable number.

127489981 is a deficient number, since it is larger than the sum of its proper divisors (7193219).

127489981 is a wasteful number, since it uses less digits than its factorization.

127489981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24179.

The product of its digits is 290304, while the sum is 49.

The square root of 127489981 is about 11291.1461331434. The cubic root of 127489981 is about 503.2981709668.

The spelling of 127489981 in words is "one hundred twenty-seven million, four hundred eighty-nine thousand, nine hundred eighty-one".