1928539 has 2 divisors, whose sum is σ = 1928540. Its totient is φ = 1928538.

The previous prime is 1928513. The next prime is 1928543. The reversal of 1928539 is 9358291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1928539 - 2⁷ = 1928411 is a prime.

1928539 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1928498 and 1928507.

It is not a weakly prime, because it can be changed into another prime (1928569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964269 + 964270.

It is an arithmetic number, because the mean of its divisors is an integer number (964270).

2^1928539 is an apocalyptic number.

1928539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1928539 is an equidigital number, since it uses as much as digits as its factorization.

1928539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 37.

The square root of 1928539 is about 1388.7184739896. The cubic root of 1928539 is about 124.4732823321.

The spelling of 1928539 in words is "one million, nine hundred twenty-eight thousand, five hundred thirty-nine".