1816373 has 4 divisors (see below), whose sum is σ = 1956108. Its totient is φ = 1676640.

The previous prime is 1816337. The next prime is 1816387. The reversal of 1816373 is 3736181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3736181 = 139 ⋅26879.

It can be written as a sum of positive squares in 2 ways, for example, as 850084 + 966289 = 922^2 + 983^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816373 - 2⁸ = 1816117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818373) 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, 69848 + ... + 69873.

It is an arithmetic number, because the mean of its divisors is an integer number (489027).

2^1816373 is an apocalyptic number.

1816373 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1816373 is a deficient number, since it is larger than the sum of its proper divisors (139735).

1816373 is a wasteful number, since it uses less digits than its factorization.

1816373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139734.

The product of its digits is 3024, while the sum is 29.

The square root of 1816373 is about 1347.7288302919. The cubic root of 1816373 is about 122.0117564591.

The spelling of 1816373 in words is "one million, eight hundred sixteen thousand, three hundred seventy-three".