86171975 has 12 divisors (see below), whose sum is σ = 107396400. Its totient is φ = 68587200.

The previous prime is 86171951. The next prime is 86171977. The reversal of 86171975 is 57917168.

It is not a de Polignac number, because 86171975 - 2¹⁴ = 86155591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86171977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3686 + ... + 13635.

It is an arithmetic number, because the mean of its divisors is an integer number (8949700).

Almost surely, 2^86171975 is an apocalyptic number.

86171975 is a deficient number, since it is larger than the sum of its proper divisors (21224425).

86171975 is a wasteful number, since it uses less digits than its factorization.

86171975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17530 (or 17525 counting only the distinct ones).

The product of its digits is 105840, while the sum is 44.

The square root of 86171975 is about 9282.8861352491. The cubic root of 86171975 is about 441.6945245670.

The spelling of 86171975 in words is "eighty-six million, one hundred seventy-one thousand, nine hundred seventy-five".