1813959 has 12 divisors (see below), whose sum is σ = 2994576. Its totient is φ = 1036512.

The previous prime is 1813943. The next prime is 1813961. The reversal of 1813959 is 9593181.

It is a happy number.

It is not a de Polignac number, because 1813959 - 2⁴ = 1813943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14334 + ... + 14459.

It is an arithmetic number, because the mean of its divisors is an integer number (249548).

2^1813959 is an apocalyptic number.

1813959 is a deficient number, since it is larger than the sum of its proper divisors (1180617).

1813959 is a wasteful number, since it uses less digits than its factorization.

1813959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28806 (or 28803 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1813959 is about 1346.8329517798. The cubic root of 1813959 is about 121.9576803858.

It can be divided in two parts, 1813 and 959, that added together give a palindrome (2772).

The spelling of 1813959 in words is "one million, eight hundred thirteen thousand, nine hundred fifty-nine".