1928489 has 2 divisors, whose sum is σ = 1928490. Its totient is φ = 1928488.

The previous prime is 1928473. The next prime is 1928501. The reversal of 1928489 is 9848291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1459264 + 469225 = 1208^2 + 685^2 .

It is an emirp because it is prime and its reverse (9848291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1928489 - 2⁴ = 1928473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1928419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964244 + 964245.

It is an arithmetic number, because the mean of its divisors is an integer number (964245).

2^1928489 is an apocalyptic number.

It is an amenable number.

1928489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1928489 is an equidigital number, since it uses as much as digits as its factorization.

1928489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 1928489 is about 1388.7004716641. The cubic root of 1928489 is about 124.4722066096.

The spelling of 1928489 in words is "one million, nine hundred twenty-eight thousand, four hundred eighty-nine".