999477 has 6 divisors (see below), whose sum is σ = 1443702. Its totient is φ = 666312.

The previous prime is 999451. The next prime is 999491. The reversal of 999477 is 774999.

It can be written as a sum of positive squares in only one way, i.e., 938961 + 60516 = 969^2 + 246^2 .

It is not a de Polignac number, because 999477 - 2⁸ = 999221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55518 + ... + 55535.

It is an arithmetic number, because the mean of its divisors is an integer number (240617).

2⁹⁹⁹⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

999477 is a deficient number, since it is larger than the sum of its proper divisors (444225).

999477 is a wasteful number, since it uses less digits than its factorization.

999477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111059 (or 111056 counting only the distinct ones).

The product of its digits is 142884, while the sum is 45.

The square root of 999477 is about 999.7384657999. The cubic root of 999477 is about 99.9825636266.

The spelling of 999477 in words is "nine hundred ninety-nine thousand, four hundred seventy-seven".