345823 has 2 divisors, whose sum is σ = 345824. Its totient is φ = 345822.

The previous prime is 345817. The next prime is 345853. The reversal of 345823 is 328543.

It is a weak prime.

It is an emirp because it is prime and its reverse (328543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345823 - 2⁵ = 345791 is a prime.

345823 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172911 + 172912.

It is an arithmetic number, because the mean of its divisors is an integer number (172912).

2³⁴⁵⁸²³ is an apocalyptic number.

345823 is a deficient number, since it is larger than the sum of its proper divisors (1).

345823 is an equidigital number, since it uses as much as digits as its factorization.

345823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 345823 is about 588.0671730338. The cubic root of 345823 is about 70.1915163597.

It can be divided in two parts, 3458 and 23, that added together give a square (3481 = 59²).

The spelling of 345823 in words is "three hundred forty-five thousand, eight hundred twenty-three".