127988000981 has 2 divisors, whose sum is σ = 127988000982. Its totient is φ = 127988000980.

The previous prime is 127988000941. The next prime is 127988000989. The reversal of 127988000981 is 189000889721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84407680900 + 43580320081 = 290530^2 + 208759^2 .

It is a cyclic number.

It is not a de Polignac number, because 127988000981 - 2¹⁰ = 127987999957 is a prime.

It is a super-2 number, since 2×127988000981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127988000989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63994000490 + 63994000491.

It is an arithmetic number, because the mean of its divisors is an integer number (63994000491).

Almost surely, 2^127988000981 is an apocalyptic number.

It is an amenable number.

127988000981 is a deficient number, since it is larger than the sum of its proper divisors (1).

127988000981 is an equidigital number, since it uses as much as digits as its factorization.

127988000981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 53.

The spelling of 127988000981 in words is "one hundred twenty-seven billion, nine hundred eighty-eight million, nine hundred eighty-one", and thus it is an aban number.