84854701979 has 4 divisors (see below), whose sum is σ = 84855902760. Its totient is φ = 84853501200.

The previous prime is 84854701973. The next prime is 84854702017. The reversal of 84854701979 is 97910745848.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 84854701979 - 2³⁶ = 16135225243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84854701973) 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, 487289 + ... + 638090.

It is an arithmetic number, because the mean of its divisors is an integer number (21213975690).

Almost surely, 2^84854701979 is an apocalyptic number.

84854701979 is a deficient number, since it is larger than the sum of its proper divisors (1200781).

84854701979 is a wasteful number, since it uses less digits than its factorization.

84854701979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200780.

The product of its (nonzero) digits is 20321280, while the sum is 62.

The spelling of 84854701979 in words is "eighty-four billion, eight hundred fifty-four million, seven hundred one thousand, nine hundred seventy-nine".