128489467 has 2 divisors, whose sum is σ = 128489468. Its totient is φ = 128489466.

The previous prime is 128489453. The next prime is 128489479. The reversal of 128489467 is 764984821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128489467 - 2²³ = 120100859 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128489467.

It is not a weakly prime, because it can be changed into another prime (128489407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64244733 + 64244734.

It is an arithmetic number, because the mean of its divisors is an integer number (64244734).

Almost surely, 2^128489467 is an apocalyptic number.

128489467 is a deficient number, since it is larger than the sum of its proper divisors (1).

128489467 is an equidigital number, since it uses as much as digits as its factorization.

128489467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 49.

The square root of 128489467 is about 11335.3194485202. The cubic root of 128489467 is about 504.6099880583.

The spelling of 128489467 in words is "one hundred twenty-eight million, four hundred eighty-nine thousand, four hundred sixty-seven".