128464877 has 2 divisors, whose sum is σ = 128464878. Its totient is φ = 128464876.

The previous prime is 128464811. The next prime is 128464879. The reversal of 128464877 is 778464821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66275881 + 62188996 = 8141^2 + 7886^2 .

It is a cyclic number.

It is not a de Polignac number, because 128464877 - 2⁸ = 128464621 is a prime.

Together with 128464879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128464879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64232438 + 64232439.

It is an arithmetic number, because the mean of its divisors is an integer number (64232439).

Almost surely, 2^128464877 is an apocalyptic number.

It is an amenable number.

128464877 is a deficient number, since it is larger than the sum of its proper divisors (1).

128464877 is an equidigital number, since it uses as much as digits as its factorization.

128464877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 602112, while the sum is 47.

The square root of 128464877 is about 11334.2347337613. The cubic root of 128464877 is about 504.5777956627.

The spelling of 128464877 in words is "one hundred twenty-eight million, four hundred sixty-four thousand, eight hundred seventy-seven".