1939559 has 2 divisors, whose sum is σ = 1939560. Its totient is φ = 1939558.

The previous prime is 1939543. The next prime is 1939571. The reversal of 1939559 is 9559391.

It is a strong prime.

It is an emirp because it is prime and its reverse (9559391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1939559 - 2⁴ = 1939543 is a prime.

It is a super-2 number, since 2×1939559² = 7523778228962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1936559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969779 + 969780.

It is an arithmetic number, because the mean of its divisors is an integer number (969780).

2^1939559 is an apocalyptic number.

1939559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1939559 is an equidigital number, since it uses as much as digits as its factorization.

1939559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54675, while the sum is 41.

The square root of 1939559 is about 1392.6805089467. The cubic root of 1939559 is about 124.7099193464.

The spelling of 1939559 in words is "one million, nine hundred thirty-nine thousand, five hundred fifty-nine".