128977683427 has 2 divisors, whose sum is σ = 128977683428. Its totient is φ = 128977683426.

The previous prime is 128977683409. The next prime is 128977683449. The reversal of 128977683427 is 724386779821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128977683427 - 2¹¹ = 128977681379 is a prime.

It is not a weakly prime, because it can be changed into another prime (128977683127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64488841713 + 64488841714.

It is an arithmetic number, because the mean of its divisors is an integer number (64488841714).

Almost surely, 2^128977683427 is an apocalyptic number.

128977683427 is a deficient number, since it is larger than the sum of its proper divisors (1).

128977683427 is an equidigital number, since it uses as much as digits as its factorization.

128977683427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56899584, while the sum is 64.

The spelling of 128977683427 in words is "one hundred twenty-eight billion, nine hundred seventy-seven million, six hundred eighty-three thousand, four hundred twenty-seven".