999245279 has 4 divisors (see below), whose sum is σ = 999308520. Its totient is φ = 999182040.

The previous prime is 999245263. The next prime is 999245297. The reversal of 999245279 is 972542999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 999245279 - 2⁴ = 999245263 is a prime.

It is a super-2 number, since 2×999245279² = 1996982255207575682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999245179) 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, 14669 + ... + 47049.

It is an arithmetic number, because the mean of its divisors is an integer number (249827130).

Almost surely, 2^999245279 is an apocalyptic number.

999245279 is a deficient number, since it is larger than the sum of its proper divisors (63241).

999245279 is a wasteful number, since it uses less digits than its factorization.

999245279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63240.

The product of its digits is 3674160, while the sum is 56.

The square root of 999245279 is about 31610.8411624873. The cubic root of 999245279 is about 999.7483630175.

The spelling of 999245279 in words is "nine hundred ninety-nine million, two hundred forty-five thousand, two hundred seventy-nine".