128464811 has 2 divisors, whose sum is σ = 128464812. Its totient is φ = 128464810.

The previous prime is 128464799. The next prime is 128464877. The reversal of 128464811 is 118464821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128464811 - 2¹⁰ = 128463787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128464891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64232405 + 64232406.

It is an arithmetic number, because the mean of its divisors is an integer number (64232406).

Almost surely, 2^128464811 is an apocalyptic number.

128464811 is a deficient number, since it is larger than the sum of its proper divisors (1).

128464811 is an equidigital number, since it uses as much as digits as its factorization.

128464811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12288, while the sum is 35.

The square root of 128464811 is about 11334.2318222277. The cubic root of 128464811 is about 504.5777092522.

The spelling of 128464811 in words is "one hundred twenty-eight million, four hundred sixty-four thousand, eight hundred eleven".