999071 has 4 divisors (see below), whose sum is σ = 1011192. Its totient is φ = 986952.

The previous prime is 999067. The next prime is 999083. The reversal of 999071 is 170999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170999 = 307 ⋅557.

It is a cyclic number.

It is not a de Polignac number, because 999071 - 2² = 999067 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999091) 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, 5936 + ... + 6101.

It is an arithmetic number, because the mean of its divisors is an integer number (252798).

2⁹⁹⁹⁰⁷¹ is an apocalyptic number.

999071 is a deficient number, since it is larger than the sum of its proper divisors (12121).

999071 is a wasteful number, since it uses less digits than its factorization.

999071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12120.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 999071 is about 999.5353920697. The cubic root of 999071 is about 99.9690237390.

The spelling of 999071 in words is "nine hundred ninety-nine thousand, seventy-one".