999995279 has 4 divisors (see below), whose sum is σ = 1000067376. Its totient is φ = 999923184.

The previous prime is 999995273. The next prime is 999995291. The reversal of 999995279 is 972599999.

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 999995279 - 2¹⁶ = 999929743 is a prime.

It is a super-3 number, since 3×999995279³ (a number of 28 digits) contains 333 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 (999995273) 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, 7934 + ... + 45419.

It is an arithmetic number, because the mean of its divisors is an integer number (250016844).

Almost surely, 2^999995279 is an apocalyptic number.

999995279 is a deficient number, since it is larger than the sum of its proper divisors (72097).

999995279 is a wasteful number, since it uses less digits than its factorization.

999995279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72096.

The product of its digits is 37200870, while the sum is 68.

The square root of 999995279 is about 31622.7019560315. The cubic root of 999995279 is about 999.9984263309.

The spelling of 999995279 in words is "nine hundred ninety-nine million, nine hundred ninety-five thousand, two hundred seventy-nine".