127107989 has 4 divisors (see below), whose sum is σ = 127358220. Its totient is φ = 126857760.

The previous prime is 127107983. The next prime is 127107991. The reversal of 127107989 is 989701721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989701721 = 5179 ⋅191099.

It can be written as a sum of positive squares in 2 ways, for example, as 97318225 + 29789764 = 9865^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 127107989 - 2⁴ = 127107973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127107983) 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, 124352 + ... + 125369.

It is an arithmetic number, because the mean of its divisors is an integer number (31839555).

Almost surely, 2^127107989 is an apocalyptic number.

It is an amenable number.

127107989 is a deficient number, since it is larger than the sum of its proper divisors (250231).

127107989 is an equidigital number, since it uses as much as digits as its factorization.

127107989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250230.

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

The square root of 127107989 is about 11274.2178886165. The cubic root of 127107989 is about 502.7949988501.

The spelling of 127107989 in words is "one hundred twenty-seven million, one hundred seven thousand, nine hundred eighty-nine".