345623 has 4 divisors (see below), whose sum is σ = 346800. Its totient is φ = 344448.

The previous prime is 345607. The next prime is 345637. The reversal of 345623 is 326543.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 326543 = 7 ⋅46649.

It is a cyclic number.

It is not a de Polignac number, because 345623 - 2⁴ = 345607 is a prime.

It is a d-powerful number, because it can be written as 3⁸ + 4³ + 6⁷ + 5 + 2³ + 3¹⁰ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278 + ... + 876.

It is an arithmetic number, because the mean of its divisors is an integer number (86700).

2³⁴⁵⁶²³ is an apocalyptic number.

345623 is a deficient number, since it is larger than the sum of its proper divisors (1177).

345623 is an equidigital number, since it uses as much as digits as its factorization.

345623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176.

The product of its digits is 2160, while the sum is 23.

The square root of 345623 is about 587.8970998398. The cubic root of 345623 is about 70.1779824513.

The spelling of 345623 in words is "three hundred forty-five thousand, six hundred twenty-three".