128924617 has 16 divisors (see below), whose sum is σ = 139812480. Its totient is φ = 118435072.

The previous prime is 128924573. The next prime is 128924639. The reversal of 128924617 is 716429821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128924617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128924617.

It is not an unprimeable number, because it can be changed into a prime (128924657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173148 + ... + 173890.

It is an arithmetic number, because the mean of its divisors is an integer number (8738280).

Almost surely, 2^128924617 is an apocalyptic number.

128924617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

128924617 is a deficient number, since it is larger than the sum of its proper divisors (10887863).

128924617 is a wasteful number, since it uses less digits than its factorization.

128924617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992.

The product of its digits is 48384, while the sum is 40.

The square root of 128924617 is about 11354.4976551145. The cubic root of 128924617 is about 505.1789935048.

The spelling of 128924617 in words is "one hundred twenty-eight million, nine hundred twenty-four thousand, six hundred seventeen".