928086121 has 4 divisors (see below), whose sum is σ = 928245892. Its totient is φ = 927926352.

The previous prime is 928086119. The next prime is 928086139. The reversal of 928086121 is 121680829.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121680829 = 1973 ⋅61673.

It can be written as a sum of positive squares in 2 ways, for example, as 344622096 + 583464025 = 18564^2 + 24155^2 .

It is a cyclic number.

It is not a de Polignac number, because 928086121 - 2¹ = 928086119 is a prime.

It is a super-2 number, since 2×928086121² = 1722687695985653282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (928086191) 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, 70830 + ... + 82903.

It is an arithmetic number, because the mean of its divisors is an integer number (232061473).

Almost surely, 2^928086121 is an apocalyptic number.

It is an amenable number.

928086121 is a deficient number, since it is larger than the sum of its proper divisors (159771).

928086121 is a wasteful number, since it uses less digits than its factorization.

928086121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159770.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 928086121 is about 30464.5059208253. The cubic root of 928086121 is about 975.4299645592.

The spelling of 928086121 in words is "nine hundred twenty-eight million, eighty-six thousand, one hundred twenty-one".