128693567 has 8 divisors (see below), whose sum is σ = 132384000. Its totient is φ = 125042904.

The previous prime is 128693557. The next prime is 128693569. The reversal of 128693567 is 765396821.

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 128693567 - 2¹² = 128689471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128693569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3317 + ... + 16382.

It is an arithmetic number, because the mean of its divisors is an integer number (16548000).

Almost surely, 2^128693567 is an apocalyptic number.

128693567 is a deficient number, since it is larger than the sum of its proper divisors (3690433).

128693567 is a wasteful number, since it uses less digits than its factorization.

128693567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19885.

The product of its digits is 544320, while the sum is 47.

The square root of 128693567 is about 11344.3187102620. The cubic root of 128693567 is about 504.8770304778.

The spelling of 128693567 in words is "one hundred twenty-eight million, six hundred ninety-three thousand, five hundred sixty-seven".