84774121 has 4 divisors (see below), whose sum is σ = 89760852. Its totient is φ = 79787392.

The previous prime is 84774089. The next prime is 84774127. The reversal of 84774121 is 12147748.

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

It can be written as a sum of positive squares in 2 ways, for example, as 61387225 + 23386896 = 7835^2 + 4836^2 .

It is not a de Polignac number, because 84774121 - 2⁵ = 84774089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84774127) 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, 2493340 + ... + 2493373.

It is an arithmetic number, because the mean of its divisors is an integer number (22440213).

Almost surely, 2^84774121 is an apocalyptic number.

It is an amenable number.

84774121 is a deficient number, since it is larger than the sum of its proper divisors (4986731).

84774121 is a wasteful number, since it uses less digits than its factorization.

84774121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4986730.

The product of its digits is 12544, while the sum is 34.

The square root of 84774121 is about 9207.2862994478. The cubic root of 84774121 is about 439.2931505397.

The spelling of 84774121 in words is "eighty-four million, seven hundred seventy-four thousand, one hundred twenty-one".