279985494471 has 8 divisors (see below), whose sum is σ = 374633124480. Its totient is φ = 185997430392.

The previous prime is 279985494421. The next prime is 279985494497. The reversal of 279985494471 is 174494589972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-279985494471 is a prime.

It is a super-3 number, since 3×279985494471³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 279985494396 and 279985494405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279985494421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164890491 + ... + 164892188.

It is an arithmetic number, because the mean of its divisors is an integer number (46829140560).

Almost surely, 2^279985494471 is an apocalyptic number.

279985494471 is a deficient number, since it is larger than the sum of its proper divisors (94647630009).

279985494471 is a wasteful number, since it uses less digits than its factorization.

279985494471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329782965.

The product of its digits is 182891520, while the sum is 69.

The spelling of 279985494471 in words is "two hundred seventy-nine billion, nine hundred eighty-five million, four hundred ninety-four thousand, four hundred seventy-one".