84171913 has 16 divisors (see below), whose sum is σ = 105145344. Its totient is φ = 65710080.

The previous prime is 84171907. The next prime is 84171931. The reversal of 84171913 is 31917148.

It is not a de Polignac number, because 84171913 - 2²⁵ = 50617481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84171943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7720 + ... + 15097.

It is an arithmetic number, because the mean of its divisors is an integer number (6571584).

Almost surely, 2^84171913 is an apocalyptic number.

It is an amenable number.

84171913 is a deficient number, since it is larger than the sum of its proper divisors (20973431).

84171913 is a wasteful number, since it uses less digits than its factorization.

84171913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22872.

The product of its digits is 6048, while the sum is 34.

The square root of 84171913 is about 9174.5252193233. The cubic root of 84171913 is about 438.2504787648.

The spelling of 84171913 in words is "eighty-four million, one hundred seventy-one thousand, nine hundred thirteen".