1822393 has 2 divisors, whose sum is σ = 1822394. Its totient is φ = 1822392.

The previous prime is 1822391. The next prime is 1822411. The reversal of 1822393 is 3932281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1671849 + 150544 = 1293^2 + 388^2 .

It is an emirp because it is prime and its reverse (3932281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1822393 - 2¹ = 1822391 is a prime.

It is a super-2 number, since 2×1822393² = 6642232492898, which contains 22 as substring.

Together with 1822391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1822391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911196 + 911197.

It is an arithmetic number, because the mean of its divisors is an integer number (911197).

2^1822393 is an apocalyptic number.

It is an amenable number.

1822393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1822393 is an equidigital number, since it uses as much as digits as its factorization.

1822393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 1822393 is about 1349.9603697887. The cubic root of 1822393 is about 122.1464022252.

Subtracting from 1822393 its product of digits (2592), we obtain a square (1819801 = 1349²).

The spelling of 1822393 in words is "one million, eight hundred twenty-two thousand, three hundred ninety-three".