1830813 has 4 divisors (see below), whose sum is σ = 2441088. Its totient is φ = 1220540.

The previous prime is 1830757. The next prime is 1830817. The reversal of 1830813 is 3180381.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1830813 - 2⁶ = 1830749 is a prime.

It is a super-3 number, since 3×1830813³ = 18409975789071533391, which contains 333 as substring.

It is a D-number.

1830813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1830817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305133 + ... + 305138.

It is an arithmetic number, because the mean of its divisors is an integer number (610272).

2^1830813 is an apocalyptic number.

It is an amenable number.

1830813 is a deficient number, since it is larger than the sum of its proper divisors (610275).

1830813 is an equidigital number, since it uses as much as digits as its factorization.

1830813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610274.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1830813 is about 1353.0753859264. The cubic root of 1830813 is about 122.3342308677.

The spelling of 1830813 in words is "one million, eight hundred thirty thousand, eight hundred thirteen".