345629 has 4 divisors (see below), whose sum is σ = 363840. Its totient is φ = 327420.

The previous prime is 345607. The next prime is 345637. The reversal of 345629 is 926543.

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, and also an emirpimes, since its reverse is a distinct semiprime: 926543 = 67 ⋅13829.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345629 is a prime.

It is a Duffinian number.

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, 9077 + ... + 9114.

It is an arithmetic number, because the mean of its divisors is an integer number (90960).

2³⁴⁵⁶²⁹ is an apocalyptic number.

It is an amenable number.

345629 is a deficient number, since it is larger than the sum of its proper divisors (18211).

345629 is a wasteful number, since it uses less digits than its factorization.

345629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18210.

The product of its digits is 6480, while the sum is 29.

The square root of 345629 is about 587.9022027514. The cubic root of 345629 is about 70.1783885445.

The spelling of 345629 in words is "three hundred forty-five thousand, six hundred twenty-nine".