1872823 has 4 divisors (see below), whose sum is σ = 1880208. Its totient is φ = 1865440.

The previous prime is 1872817. The next prime is 1872841. The reversal of 1872823 is 3282781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3282781 = 461 ⋅7121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1872823 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 (1872323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3298 + ... + 3823.

It is an arithmetic number, because the mean of its divisors is an integer number (470052).

2^1872823 is an apocalyptic number.

1872823 is the 732-nd centered heptagonal number.

1872823 is a deficient number, since it is larger than the sum of its proper divisors (7385).

1872823 is an equidigital number, since it uses as much as digits as its factorization.

1872823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7384.

The product of its digits is 5376, while the sum is 31.

The square root of 1872823 is about 1368.5112348826. The cubic root of 1872823 is about 123.2628612905.

The spelling of 1872823 in words is "one million, eight hundred seventy-two thousand, eight hundred twenty-three".