84340779 has 8 divisors (see below), whose sum is σ = 112779840. Its totient is φ = 56064456.

The previous prime is 84340771. The next prime is 84340811. The reversal of 84340779 is 97704348.

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

It is not a de Polignac number, because 84340779 - 2³ = 84340771 is a prime.

It is a super-2 number, since 2×84340779² = 14226734004653682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84340779.

It is not an unprimeable number, because it can be changed into a prime (84340771) 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, 39469 + ... + 41550.

It is an arithmetic number, because the mean of its divisors is an integer number (14097480).

Almost surely, 2^84340779 is an apocalyptic number.

84340779 is a deficient number, since it is larger than the sum of its proper divisors (28439061).

84340779 is a wasteful number, since it uses less digits than its factorization.

84340779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81369.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 84340779 is about 9183.7235912238. The cubic root of 84340779 is about 438.5433562330.

The spelling of 84340779 in words is "eighty-four million, three hundred forty thousand, seven hundred seventy-nine".