84222779 has 8 divisors (see below), whose sum is σ = 84829680. Its totient is φ = 83618656.

The previous prime is 84222773. The next prime is 84222793. The reversal of 84222779 is 97722248.

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

It is a cyclic number.

It is not a de Polignac number, because 84222779 - 2¹² = 84218683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84222773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122972 + ... + 123654.

It is an arithmetic number, because the mean of its divisors is an integer number (10603710).

Almost surely, 2^84222779 is an apocalyptic number.

84222779 is a deficient number, since it is larger than the sum of its proper divisors (606901).

84222779 is a wasteful number, since it uses less digits than its factorization.

84222779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389.

The product of its digits is 112896, while the sum is 41.

The square root of 84222779 is about 9177.2969331933. The cubic root of 84222779 is about 438.3387408272.

The spelling of 84222779 in words is "eighty-four million, two hundred twenty-two thousand, seven hundred seventy-nine".