84279447 has 24 divisors (see below), whose sum is σ = 144283776. Its totient is φ = 48158712.

The previous prime is 84279439. The next prime is 84279457. The reversal of 84279447 is 74497248.

It is not a de Polignac number, because 84279447 - 2³ = 84279439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84279457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23073 + ... + 26474.

It is an arithmetic number, because the mean of its divisors is an integer number (6011824).

Almost surely, 2^84279447 is an apocalyptic number.

84279447 is a deficient number, since it is larger than the sum of its proper divisors (60004329).

84279447 is an equidigital number, since it uses as much as digits as its factorization.

84279447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49569 (or 49557 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 84279447 is about 9180.3838155058. The cubic root of 84279447 is about 438.4370286108.

The spelling of 84279447 in words is "eighty-four million, two hundred seventy-nine thousand, four hundred forty-seven".