1928929 has 2 divisors, whose sum is σ = 1928930. Its totient is φ = 1928928.

The previous prime is 1928873. The next prime is 1928947. The reversal of 1928929 is 9298291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030225 + 898704 = 1015^2 + 948^2 .

It is a cyclic number.

It is not a de Polignac number, because 1928929 - 2¹⁵ = 1896161 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1928891 and 1928900.

It is not a weakly prime, because it can be changed into another prime (1928959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964464 + 964465.

It is an arithmetic number, because the mean of its divisors is an integer number (964465).

2^1928929 is an apocalyptic number.

It is an amenable number.

1928929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1928929 is an equidigital number, since it uses as much as digits as its factorization.

1928929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 1928929 is about 1388.8588841203. The cubic root of 1928929 is about 124.4816723289.

The spelling of 1928929 in words is "one million, nine hundred twenty-eight thousand, nine hundred twenty-nine".