2140823 has 2 divisors, whose sum is σ = 2140824. Its totient is φ = 2140822.

The previous prime is 2140811. The next prime is 2140843. The reversal of 2140823 is 3280412.

It is an a-pointer prime, because the next prime (2140843) can be obtained adding 2140823 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2140823 - 2⁴ = 2140807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2140795 and 2140804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2140843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070411 + 1070412.

It is an arithmetic number, because the mean of its divisors is an integer number (1070412).

2^2140823 is an apocalyptic number.

2140823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140823 is an equidigital number, since it uses as much as digits as its factorization.

2140823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2140823 is about 1463.1551524018. The cubic root of 2140823 is about 128.8823918588.

It can be divided in two parts, 214082 and 3, that multiplied together give a palindrome (642246).

The spelling of 2140823 in words is "two million, one hundred forty thousand, eight hundred twenty-three".