999488671 has 4 divisors (see below), whose sum is σ = 999868912. Its totient is φ = 999108432.

The previous prime is 999488657. The next prime is 999488717. The reversal of 999488671 is 176884999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176884999 = 1979 ⋅89381.

It is a cyclic number.

It is not a de Polignac number, because 999488671 - 2⁹ = 999488159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999488071) 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, 186150 + ... + 191443.

It is an arithmetic number, because the mean of its divisors is an integer number (249967228).

Almost surely, 2^999488671 is an apocalyptic number.

999488671 is a deficient number, since it is larger than the sum of its proper divisors (380241).

999488671 is a wasteful number, since it uses less digits than its factorization.

999488671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380240.

The product of its digits is 7838208, while the sum is 61.

The square root of 999488671 is about 31614.6907465501. The cubic root of 999488671 is about 999.8295279409.

The spelling of 999488671 in words is "nine hundred ninety-nine million, four hundred eighty-eight thousand, six hundred seventy-one".