84131105 has 8 divisors (see below), whose sum is σ = 101884200. Its totient is φ = 66686976.

The previous prime is 84131101. The next prime is 84131123. The reversal of 84131105 is 50113148.

It can be written as a sum of positive squares in 4 ways, for example, as 8162449 + 75968656 = 2857^2 + 8716^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 84131105 - 2² = 84131101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84131101) 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, 76640 + ... + 77729.

It is an arithmetic number, because the mean of its divisors is an integer number (12735525).

Almost surely, 2^84131105 is an apocalyptic number.

It is an amenable number.

84131105 is a deficient number, since it is larger than the sum of its proper divisors (17753095).

84131105 is a wasteful number, since it uses less digits than its factorization.

84131105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154483.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 84131105 is about 9172.3009654067. The cubic root of 84131105 is about 438.1796435108.

The spelling of 84131105 in words is "eighty-four million, one hundred thirty-one thousand, one hundred five".