928172099 has 4 divisors (see below), whose sum is σ = 928242120. Its totient is φ = 928102080.

The previous prime is 928172087. The next prime is 928172159. The reversal of 928172099 is 990271829.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 990271829 = 10079 ⋅98251.

It is a cyclic number.

It is not a de Polignac number, because 928172099 - 2¹⁶ = 928106563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (928172029) 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, 8369 + ... + 43890.

It is an arithmetic number, because the mean of its divisors is an integer number (232060530).

Almost surely, 2^928172099 is an apocalyptic number.

928172099 is a deficient number, since it is larger than the sum of its proper divisors (70021).

928172099 is a wasteful number, since it uses less digits than its factorization.

928172099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70020.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 928172099 is about 30465.9170057295. The cubic root of 928172099 is about 975.4600849420.

The spelling of 928172099 in words is "nine hundred twenty-eight million, one hundred seventy-two thousand, ninety-nine".