1878223 has 2 divisors, whose sum is σ = 1878224. Its totient is φ = 1878222.

The previous prime is 1878221. The next prime is 1878229. The reversal of 1878223 is 3228781.

It is a weak prime.

It is an emirp because it is prime and its reverse (3228781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1878223 - 2¹ = 1878221 is a prime.

Together with 1878221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1878221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 939111 + 939112.

It is an arithmetic number, because the mean of its divisors is an integer number (939112).

2^1878223 is an apocalyptic number.

1878223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1878223 is an equidigital number, since it uses as much as digits as its factorization.

1878223 is an evil number, because the sum of its binary digits is even.

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

The square root of 1878223 is about 1370.4827616574. The cubic root of 1878223 is about 123.3812175075.

The spelling of 1878223 in words is "one million, eight hundred seventy-eight thousand, two hundred twenty-three".