928139 has 2 divisors, whose sum is σ = 928140. Its totient is φ = 928138.

The previous prime is 928111. The next prime is 928141. The reversal of 928139 is 931829.

928139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 928139 - 2¹² = 924043 is a prime.

It is a super-2 number, since 2×928139² = 1722884006642, which contains 22 as substring.

Together with 928141, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 928139.

It is not a weakly prime, because it can be changed into another prime (928159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464069 + 464070.

It is an arithmetic number, because the mean of its divisors is an integer number (464070).

2⁹²⁸¹³⁹ is an apocalyptic number.

928139 is a deficient number, since it is larger than the sum of its proper divisors (1).

928139 is an equidigital number, since it uses as much as digits as its factorization.

928139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 928139 is about 963.3997093626. The cubic root of 928139 is about 97.5448489701.

The spelling of 928139 in words is "nine hundred twenty-eight thousand, one hundred thirty-nine".