128463847 has 4 divisors (see below), whose sum is σ = 128554560. Its totient is φ = 128373136.

The previous prime is 128463787. The next prime is 128463869. The reversal of 128463847 is 748364821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128463847 - 2²³ = 120075239 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 (128463887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43198 + ... + 46075.

It is an arithmetic number, because the mean of its divisors is an integer number (32138640).

Almost surely, 2^128463847 is an apocalyptic number.

128463847 is a deficient number, since it is larger than the sum of its proper divisors (90713).

128463847 is an equidigital number, since it uses as much as digits as its factorization.

128463847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90712.

The product of its digits is 258048, while the sum is 43.

The square root of 128463847 is about 11334.1892961076. The cubic root of 128463847 is about 504.5764471320.

The spelling of 128463847 in words is "one hundred twenty-eight million, four hundred sixty-three thousand, eight hundred forty-seven".