127989620999 has 2 divisors, whose sum is σ = 127989621000. Its totient is φ = 127989620998.

The previous prime is 127989620971. The next prime is 127989621073. The reversal of 127989620999 is 999026989721.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 127989620999 - 2¹² = 127989616903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127989625999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63994810499 + 63994810500.

It is an arithmetic number, because the mean of its divisors is an integer number (63994810500).

Almost surely, 2^127989620999 is an apocalyptic number.

127989620999 is a deficient number, since it is larger than the sum of its proper divisors (1).

127989620999 is an equidigital number, since it uses as much as digits as its factorization.

127989620999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79361856, while the sum is 71.

The spelling of 127989620999 in words is "one hundred twenty-seven billion, nine hundred eighty-nine million, six hundred twenty thousand, nine hundred ninety-nine".