84171069 has 18 divisors (see below), whose sum is σ = 126260030. Its totient is φ = 56109672.

The previous prime is 84171067. The next prime is 84171089. The reversal of 84171069 is 96017148.

It can be written as a sum of positive squares in only one way, i.e., 79388100 + 4782969 = 8910^2 + 2187^2 .

It is not a de Polignac number, because 84171069 - 2¹ = 84171067 is a prime.

It is a super-2 number, since 2×84171069² = 14169537713205522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84171067) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 147 + ... + 12975.

Almost surely, 2^84171069 is an apocalyptic number.

It is an amenable number.

84171069 is a deficient number, since it is larger than the sum of its proper divisors (42088961).

84171069 is an frugal number, since it uses more digits than its factorization.

84171069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12853 (or 12832 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 84171069 is about 9174.4792222774. The cubic root of 84171069 is about 438.2490139664.

The spelling of 84171069 in words is "eighty-four million, one hundred seventy-one thousand, sixty-nine".