86137281 has 6 divisors (see below), whose sum is σ = 124420530. Its totient is φ = 57424848.

The previous prime is 86137253. The next prime is 86137291. The reversal of 86137281 is 18273168.

It can be written as a sum of positive squares in only one way, i.e., 83887281 + 2250000 = 9159^2 + 1500^2 .

It is not a de Polignac number, because 86137281 - 2⁶ = 86137217 is a prime.

It is a super-2 number, since 2×86137281² = 14839262356145922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86137201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4785396 + ... + 4785413.

It is an arithmetic number, because the mean of its divisors is an integer number (20736755).

Almost surely, 2^86137281 is an apocalyptic number.

It is an amenable number.

86137281 is a deficient number, since it is larger than the sum of its proper divisors (38283249).

86137281 is a wasteful number, since it uses less digits than its factorization.

86137281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570815 (or 9570812 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 86137281 is about 9281.0172395056. The cubic root of 86137281 is about 441.6352392178.

The spelling of 86137281 in words is "eighty-six million, one hundred thirty-seven thousand, two hundred eighty-one".