345399 has 4 divisors (see below), whose sum is σ = 460536. Its totient is φ = 230264.

The previous prime is 345379. The next prime is 345413. The reversal of 345399 is 993543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 345399 - 2⁷ = 345271 is a prime.

It is a D-number.

345399 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 345399.

It is not an unprimeable number, because it can be changed into a prime (345329) 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, 57564 + ... + 57569.

It is an arithmetic number, because the mean of its divisors is an integer number (115134).

2³⁴⁵³⁹⁹ is an apocalyptic number.

345399 is a deficient number, since it is larger than the sum of its proper divisors (115137).

345399 is a wasteful number, since it uses less digits than its factorization.

345399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115136.

The product of its digits is 14580, while the sum is 33.

The square root of 345399 is about 587.7065594325. The cubic root of 345399 is about 70.1628182740.

The spelling of 345399 in words is "three hundred forty-five thousand, three hundred ninety-nine".