349999 has 12 divisors (see below), whose sum is σ = 402600. Its totient is φ = 303264.

The previous prime is 349981. The next prime is 350003. The reversal of 349999 is 999943.

349999 = T₁₁₄ + T₁₁₅ + ... + T₁₅₂.

It is not a de Polignac number, because 349999 - 2⁵ = 349967 is a prime.

It is a Duffinian number.

349999 is a modest number, since divided by 999 gives 349 as remainder.

349999 is a lucky 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 (349919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3157 + ... + 3265.

It is an arithmetic number, because the mean of its divisors is an integer number (33550).

2³⁴⁹⁹⁹⁹ is an apocalyptic number.

349999 is a deficient number, since it is larger than the sum of its proper divisors (52601).

349999 is a wasteful number, since it uses less digits than its factorization.

349999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 141 counting only the distinct ones).

The product of its digits is 78732, while the sum is 43.

The square root of 349999 is about 591.6071331551. The cubic root of 349999 is about 70.4729202035.

The spelling of 349999 in words is "three hundred forty-nine thousand, nine hundred ninety-nine".