84715171 has 2 divisors, whose sum is σ = 84715172. Its totient is φ = 84715170.

The previous prime is 84715123. The next prime is 84715181. The reversal of 84715171 is 17151748.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84715171 is a prime.

It is not a weakly prime, because it can be changed into another prime (84715181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42357585 + 42357586.

It is an arithmetic number, because the mean of its divisors is an integer number (42357586).

Almost surely, 2^84715171 is an apocalyptic number.

84715171 is a deficient number, since it is larger than the sum of its proper divisors (1).

84715171 is an equidigital number, since it uses as much as digits as its factorization.

84715171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 34.

The square root of 84715171 is about 9204.0844737540. The cubic root of 84715171 is about 439.1913020989.

The spelling of 84715171 in words is "eighty-four million, seven hundred fifteen thousand, one hundred seventy-one".