349993 has 4 divisors (see below), whose sum is σ = 400000. Its totient is φ = 299988.

The previous prime is 349981. The next prime is 350003. The reversal of 349993 is 399943.

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 a de Polignac number, because none of the positive numbers 2^k-349993 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349903) 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, 24993 + ... + 25006.

It is an arithmetic number, because the mean of its divisors is an integer number (100000).

2³⁴⁹⁹⁹³ is an apocalyptic number.

It is an amenable number.

349993 is a deficient number, since it is larger than the sum of its proper divisors (50007).

349993 is an equidigital number, since it uses as much as digits as its factorization.

349993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50006.

The product of its digits is 26244, while the sum is 37.

The square root of 349993 is about 591.6020622006. The cubic root of 349993 is about 70.4725174976.

The spelling of 349993 in words is "three hundred forty-nine thousand, nine hundred ninety-three".