86740581 has 4 divisors (see below), whose sum is σ = 115654112. Its totient is φ = 57827052.

The previous prime is 86740553. The next prime is 86740583. The reversal of 86740581 is 18504768.

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 not a de Polignac number, because 86740581 - 2¹⁹ = 86216293 is a prime.

It is a super-2 number, since 2×86740581² = 15047856784435122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86740583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14456761 + ... + 14456766.

It is an arithmetic number, because the mean of its divisors is an integer number (28913528).

Almost surely, 2^86740581 is an apocalyptic number.

It is an amenable number.

86740581 is a deficient number, since it is larger than the sum of its proper divisors (28913531).

86740581 is a wasteful number, since it uses less digits than its factorization.

86740581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28913530.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 86740581 is about 9313.4623529598. The cubic root of 86740581 is about 442.6639030221.

The spelling of 86740581 in words is "eighty-six million, seven hundred forty thousand, five hundred eighty-one".