84279089 has 4 divisors (see below), whose sum is σ = 84297456. Its totient is φ = 84260724.

The previous prime is 84279077. The next prime is 84279101. The reversal of 84279089 is 98097248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (84279077) and next prime (84279101).

It is a cyclic number.

It is not a de Polignac number, because 84279089 - 2⁴ = 84279073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84279589) 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, 4262 + ... + 13664.

It is an arithmetic number, because the mean of its divisors is an integer number (21074364).

Almost surely, 2^84279089 is an apocalyptic number.

It is an amenable number.

84279089 is a deficient number, since it is larger than the sum of its proper divisors (18367).

84279089 is an equidigital number, since it uses as much as digits as its factorization.

84279089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18366.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 84279089 is about 9180.3643173896. The cubic root of 84279089 is about 438.4364078161.

The spelling of 84279089 in words is "eighty-four million, two hundred seventy-nine thousand, eighty-nine".