999417 has 4 divisors (see below), whose sum is σ = 1332560. Its totient is φ = 666276.

The previous prime is 999389. The next prime is 999431. The reversal of 999417 is 714999.

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 not a de Polignac number, because 999417 - 2¹¹ = 997369 is a prime.

It is a D-number.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 166567 + ... + 166572.

It is an arithmetic number, because the mean of its divisors is an integer number (333140).

2⁹⁹⁹⁴¹⁷ is an apocalyptic number.

It is an amenable number.

999417 is a deficient number, since it is larger than the sum of its proper divisors (333143).

999417 is a wasteful number, since it uses less digits than its factorization.

999417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333142.

The product of its digits is 20412, while the sum is 39.

The square root of 999417 is about 999.7084575015. The cubic root of 999417 is about 99.9805628889.

It can be divided in two parts, 9994 and 17, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 999417 in words is "nine hundred ninety-nine thousand, four hundred seventeen".