1873813 has 4 divisors (see below), whose sum is σ = 1879020. Its totient is φ = 1868608.

The previous prime is 1873783. The next prime is 1873831. The reversal of 1873813 is 3183781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3183781 = 109 ⋅29209.

It can be written as a sum of positive squares in 2 ways, for example, as 293764 + 1580049 = 542^2 + 1257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1873813 is a prime.

It is a super-2 number, since 2×1873813² = 7022350317938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1873013) 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, 2020 + ... + 2797.

It is an arithmetic number, because the mean of its divisors is an integer number (469755).

2^1873813 is an apocalyptic number.

It is an amenable number.

1873813 is a deficient number, since it is larger than the sum of its proper divisors (5207).

1873813 is an equidigital number, since it uses as much as digits as its factorization.

1873813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5206.

The product of its digits is 4032, while the sum is 31.

The square root of 1873813 is about 1368.8728940263. The cubic root of 1873813 is about 123.2845769459.

The spelling of 1873813 in words is "one million, eight hundred seventy-three thousand, eight hundred thirteen".