999349 has 4 divisors (see below), whose sum is σ = 1076236. Its totient is φ = 922464.

The previous prime is 999331. The next prime is 999359. The reversal of 999349 is 943999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 943999 = 7 ⋅134857.

It can be written as a sum of positive squares in 2 ways, for example, as 651249 + 348100 = 807^2 + 590^2 .

It is a cyclic number.

It is not a de Polignac number, because 999349 - 2⁷ = 999221 is a prime.

It is a Duffinian number.

999349 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999329) 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, 38424 + ... + 38449.

It is an arithmetic number, because the mean of its divisors is an integer number (269059).

2⁹⁹⁹³⁴⁹ is an apocalyptic number.

It is an amenable number.

999349 is a deficient number, since it is larger than the sum of its proper divisors (76887).

999349 is a wasteful number, since it uses less digits than its factorization.

999349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76886.

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

The square root of 999349 is about 999.6744470076. The cubic root of 999349 is about 99.9782952894.

The spelling of 999349 in words is "nine hundred ninety-nine thousand, three hundred forty-nine".