86734581 has 4 divisors (see below), whose sum is σ = 115646112. Its totient is φ = 57823052.

The previous prime is 86734579. The next prime is 86734591. The reversal of 86734581 is 18543768.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86734581 - 2¹ = 86734579 is a prime.

It is a super-2 number, since 2×86734581² = 15045775082491122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86734511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14455761 + ... + 14455766.

It is an arithmetic number, because the mean of its divisors is an integer number (28911528).

Almost surely, 2^86734581 is an apocalyptic number.

It is an amenable number.

86734581 is a deficient number, since it is larger than the sum of its proper divisors (28911531).

86734581 is a wasteful number, since it uses less digits than its factorization.

86734581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28911530.

The product of its digits is 161280, while the sum is 42.

The square root of 86734581 is about 9313.1402330256. The cubic root of 86734581 is about 442.6536961707.

The spelling of 86734581 in words is "eighty-six million, seven hundred thirty-four thousand, five hundred eighty-one".