345669 has 4 divisors (see below), whose sum is σ = 460896. Its totient is φ = 230444.

The previous prime is 345659. The next prime is 345673. The reversal of 345669 is 966543.

It is a happy number.

345669 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 345669 - 2⁵ = 345637 is a prime.

It is a super-2 number, since 2×345669² = 238974115122, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3³ + 4⁸ + 6² + 5³ + 6⁷ + 9 .

It is a D-number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345659) 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, 57609 + ... + 57614.

It is an arithmetic number, because the mean of its divisors is an integer number (115224).

2³⁴⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

345669 is a deficient number, since it is larger than the sum of its proper divisors (115227).

345669 is a wasteful number, since it uses less digits than its factorization.

345669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115226.

The product of its digits is 19440, while the sum is 33.

The square root of 345669 is about 587.9362210308. The cubic root of 345669 is about 70.1810957124.

The spelling of 345669 in words is "three hundred forty-five thousand, six hundred sixty-nine".