928129 has 4 divisors (see below), whose sum is σ = 943920. Its totient is φ = 912340.

The previous prime is 928111. The next prime is 928139. The reversal of 928129 is 921829.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 921829 = 53 ⋅17393.

It is a cyclic number.

It is not a de Polignac number, because 928129 - 2⁵ = 928097 is a prime.

It is a super-2 number, since 2×928129² = 1722846881282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 928129.

It is not an unprimeable number, because it can be changed into a prime (928139) 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, 7807 + ... + 7924.

It is an arithmetic number, because the mean of its divisors is an integer number (235980).

2⁹²⁸¹²⁹ is an apocalyptic number.

It is an amenable number.

928129 is a deficient number, since it is larger than the sum of its proper divisors (15791).

928129 is a wasteful number, since it uses less digits than its factorization.

928129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15790.

The product of its digits is 2592, while the sum is 31.

The square root of 928129 is about 963.3945193948. The cubic root of 928129 is about 97.5444986447.

The spelling of 928129 in words is "nine hundred twenty-eight thousand, one hundred twenty-nine".