128679847 has 2 divisors, whose sum is σ = 128679848. Its totient is φ = 128679846.

The previous prime is 128679839. The next prime is 128679877. The reversal of 128679847 is 748976821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128679847 - 2³ = 128679839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128679794 and 128679803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128679877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64339923 + 64339924.

It is an arithmetic number, because the mean of its divisors is an integer number (64339924).

Almost surely, 2^128679847 is an apocalyptic number.

128679847 is a deficient number, since it is larger than the sum of its proper divisors (1).

128679847 is an equidigital number, since it uses as much as digits as its factorization.

128679847 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 128679847 is about 11343.7139861687. The cubic root of 128679847 is about 504.8590882211.

The spelling of 128679847 in words is "one hundred twenty-eight million, six hundred seventy-nine thousand, eight hundred forty-seven".