84612779 has 4 divisors (see below), whose sum is σ = 85180800. Its totient is φ = 84044760.

The previous prime is 84612761. The next prime is 84612793. The reversal of 84612779 is 97721648.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84612779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84612709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283787 + ... + 284084.

It is an arithmetic number, because the mean of its divisors is an integer number (21295200).

Almost surely, 2^84612779 is an apocalyptic number.

84612779 is a deficient number, since it is larger than the sum of its proper divisors (568021).

84612779 is a wasteful number, since it uses less digits than its factorization.

84612779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568020.

The product of its digits is 169344, while the sum is 44.

The square root of 84612779 is about 9198.5204788596. The cubic root of 84612779 is about 439.0142861636.

The spelling of 84612779 in words is "eighty-four million, six hundred twelve thousand, seven hundred seventy-nine".