84779894 has 4 divisors (see below), whose sum is σ = 127169844. Its totient is φ = 42389946.

The previous prime is 84779879. The next prime is 84779897. The reversal of 84779894 is 49897748.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84779897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21194972 + ... + 21194975.

It is an arithmetic number, because the mean of its divisors is an integer number (31792461).

Almost surely, 2^84779894 is an apocalyptic number.

84779894 is a deficient number, since it is larger than the sum of its proper divisors (42389950).

84779894 is a wasteful number, since it uses less digits than its factorization.

84779894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42389949.

The product of its digits is 4064256, while the sum is 56.

The square root of 84779894 is about 9207.5997958208. The cubic root of 84779894 is about 439.3031220646.

The spelling of 84779894 in words is "eighty-four million, seven hundred seventy-nine thousand, eight hundred ninety-four".