84081017 has 4 divisors (see below), whose sum is σ = 84227316. Its totient is φ = 83934720.

The previous prime is 84081013. The next prime is 84081071. The reversal of 84081017 is 71018048.

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 74321641 + 9759376 = 8621^2 + 3124^2 .

It is a cyclic number.

It is not a de Polignac number, because 84081017 - 2² = 84081013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84081013) 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, 72284 + ... + 73437.

It is an arithmetic number, because the mean of its divisors is an integer number (21056829).

Almost surely, 2^84081017 is an apocalyptic number.

It is an amenable number.

84081017 is a deficient number, since it is larger than the sum of its proper divisors (146299).

84081017 is a wasteful number, since it uses less digits than its factorization.

84081017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146298.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 84081017 is about 9169.5701644079. The cubic root of 84081017 is about 438.0926685489.

The spelling of 84081017 in words is "eighty-four million, eighty-one thousand, seventeen".