1906559 has 2 divisors, whose sum is σ = 1906560. Its totient is φ = 1906558.

The previous prime is 1906543. The next prime is 1906579. The reversal of 1906559 is 9556091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1906559 - 2⁴ = 1906543 is a 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 (1906579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953279 + 953280.

It is an arithmetic number, because the mean of its divisors is an integer number (953280).

2^1906559 is an apocalyptic number.

1906559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906559 is an equidigital number, since it uses as much as digits as its factorization.

1906559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 1906559 is about 1380.7820247961. The cubic root of 1906559 is about 123.9985908615.

The spelling of 1906559 in words is "one million, nine hundred six thousand, five hundred fifty-nine".