127982389 has 2 divisors, whose sum is σ = 127982390. Its totient is φ = 127982388.

The previous prime is 127982383. The next prime is 127982401. The reversal of 127982389 is 983289721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 3771364 = 11145^2 + 1942^2 .

It is a cyclic number.

It is not a de Polignac number, because 127982389 - 2³ = 127982381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127982381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63991194 + 63991195.

It is an arithmetic number, because the mean of its divisors is an integer number (63991195).

Almost surely, 2^127982389 is an apocalyptic number.

It is an amenable number.

127982389 is a deficient number, since it is larger than the sum of its proper divisors (1).

127982389 is an equidigital number, since it uses as much as digits as its factorization.

127982389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 127982389 is about 11312.9301686168. The cubic root of 127982389 is about 503.9453059087.

The spelling of 127982389 in words is "one hundred twenty-seven million, nine hundred eighty-two thousand, three hundred eighty-nine".