128683605 has 8 divisors (see below), whose sum is σ = 205893792. Its totient is φ = 68631248.

The previous prime is 128683571. The next prime is 128683651. The reversal of 128683605 is 506386821.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128683605 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4289439 + ... + 4289468.

It is an arithmetic number, because the mean of its divisors is an integer number (25736724).

Almost surely, 2^128683605 is an apocalyptic number.

128683605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128683605 is a deficient number, since it is larger than the sum of its proper divisors (77210187).

128683605 is an equidigital number, since it uses as much as digits as its factorization.

128683605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8578915.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 128683605 is about 11343.8796273585. The cubic root of 128683605 is about 504.8640028523.

The spelling of 128683605 in words is "one hundred twenty-eight million, six hundred eighty-three thousand, six hundred five".