128471679 has 24 divisors (see below), whose sum is σ = 216413600. Its totient is φ = 73410624.

The previous prime is 128471647. The next prime is 128471683. The reversal of 128471679 is 976174821.

It is a happy number.

It is not a de Polignac number, because 128471679 - 2⁵ = 128471647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128471689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17722 + ... + 23895.

Almost surely, 2^128471679 is an apocalyptic number.

128471679 is a deficient number, since it is larger than the sum of its proper divisors (87941921).

128471679 is an equidigital number, since it uses as much as digits as its factorization.

128471679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41644 (or 41627 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 128471679 is about 11334.5347941590. The cubic root of 128471679 is about 504.5867010218.

The spelling of 128471679 in words is "one hundred twenty-eight million, four hundred seventy-one thousand, six hundred seventy-nine".