128947463 has 8 divisors (see below), whose sum is σ = 133345008. Its totient is φ = 124622784.

The previous prime is 128947459. The next prime is 128947487. The reversal of 128947463 is 364749821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128947463 - 2² = 128947459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128947493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14606 + ... + 21707.

It is an arithmetic number, because the mean of its divisors is an integer number (16668126).

Almost surely, 2^128947463 is an apocalyptic number.

128947463 is a deficient number, since it is larger than the sum of its proper divisors (4397545).

128947463 is an equidigital number, since it uses as much as digits as its factorization.

128947463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36433.

The product of its digits is 290304, while the sum is 44.

The square root of 128947463 is about 11355.5036436082. The cubic root of 128947463 is about 505.2088317102.

The spelling of 128947463 in words is "one hundred twenty-eight million, nine hundred forty-seven thousand, four hundred sixty-three".