345993 has 4 divisors (see below), whose sum is σ = 461328. Its totient is φ = 230660.

The previous prime is 345979. The next prime is 345997. The reversal of 345993 is 399543.

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 345993 - 2¹⁰ = 344969 is a prime.

It is a super-2 number, since 2×345993² = 239422312098, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (345997) 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, 57663 + ... + 57668.

It is an arithmetic number, because the mean of its divisors is an integer number (115332).

2³⁴⁵⁹⁹³ is an apocalyptic number.

It is an amenable number.

345993 is a deficient number, since it is larger than the sum of its proper divisors (115335).

345993 is a wasteful number, since it uses less digits than its factorization.

345993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115334.

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

The square root of 345993 is about 588.2116965855. The cubic root of 345993 is about 70.2030160797.

The spelling of 345993 in words is "three hundred forty-five thousand, nine hundred ninety-three".