128678479 has 2 divisors, whose sum is σ = 128678480. Its totient is φ = 128678478.

The previous prime is 128678471. The next prime is 128678497. The reversal of 128678479 is 974876821.

Together with next prime (128678497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128678479 - 2³ = 128678471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128678471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64339239 + 64339240.

It is an arithmetic number, because the mean of its divisors is an integer number (64339240).

Almost surely, 2^128678479 is an apocalyptic number.

128678479 is a deficient number, since it is larger than the sum of its proper divisors (1).

128678479 is an equidigital number, since it uses as much as digits as its factorization.

128678479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 52.

The square root of 128678479 is about 11343.6536882964. The cubic root of 128678479 is about 504.8572991565.

The spelling of 128678479 in words is "one hundred twenty-eight million, six hundred seventy-eight thousand, four hundred seventy-nine".