1808959 has 2 divisors, whose sum is σ = 1808960. Its totient is φ = 1808958.

The previous prime is 1808951. The next prime is 1808969. The reversal of 1808959 is 9598081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1808959 - 2³ = 1808951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1808951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904479 + 904480.

It is an arithmetic number, because the mean of its divisors is an integer number (904480).

2^1808959 is an apocalyptic number.

1808959 is a deficient number, since it is larger than the sum of its proper divisors (1).

1808959 is an equidigital number, since it uses as much as digits as its factorization.

1808959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1808959 is about 1344.9754644602. The cubic root of 1808959 is about 121.8455224787.

The spelling of 1808959 in words is "one million, eight hundred eight thousand, nine hundred fifty-nine".