86704281 has 12 divisors (see below), whose sum is σ = 125401380. Its totient is φ = 57728160.

The previous prime is 86704279. The next prime is 86704307. The reversal of 86704281 is 18240768.

It can be written as a sum of positive squares in 2 ways, for example, as 25160256 + 61544025 = 5016^2 + 7845^2 .

It is not a de Polignac number, because 86704281 - 2¹ = 86704279 is a prime.

It is a super-2 number, since 2×86704281² = 15035264687453922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86704271) 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, 1651 + ... + 13271.

It is an arithmetic number, because the mean of its divisors is an integer number (10450115).

Almost surely, 2^86704281 is an apocalyptic number.

It is an amenable number.

86704281 is a deficient number, since it is larger than the sum of its proper divisors (38697099).

86704281 is a wasteful number, since it uses less digits than its factorization.

86704281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12456 (or 12453 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 86704281 is about 9311.5133571294. The cubic root of 86704281 is about 442.6021443791.

The spelling of 86704281 in words is "eighty-six million, seven hundred four thousand, two hundred eighty-one".