1897823 has 2 divisors, whose sum is σ = 1897824. Its totient is φ = 1897822.

The previous prime is 1897807. The next prime is 1897843. The reversal of 1897823 is 3287981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1897823 - 2⁴ = 1897807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1897843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 948911 + 948912.

It is an arithmetic number, because the mean of its divisors is an integer number (948912).

2^1897823 is an apocalyptic number.

1897823 is a deficient number, since it is larger than the sum of its proper divisors (1).

1897823 is an equidigital number, since it uses as much as digits as its factorization.

1897823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 1897823 is about 1377.6149679791. The cubic root of 1897823 is about 123.8089104952.

The spelling of 1897823 in words is "one million, eight hundred ninety-seven thousand, eight hundred twenty-three".