86509213 has 4 divisors (see below), whose sum is σ = 98867680. Its totient is φ = 74150748.

The previous prime is 86509211. The next prime is 86509229. The reversal of 86509213 is 31290568.

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 86509213 - 2¹ = 86509211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86509211) 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 3 ways as a sum of consecutive naturals, for example, 6179223 + ... + 6179236.

It is an arithmetic number, because the mean of its divisors is an integer number (24716920).

Almost surely, 2^86509213 is an apocalyptic number.

It is an amenable number.

86509213 is a deficient number, since it is larger than the sum of its proper divisors (12358467).

86509213 is a wasteful number, since it uses less digits than its factorization.

86509213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12358466.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 86509213 is about 9301.0328996300. The cubic root of 86509213 is about 442.2699718390.

The spelling of 86509213 in words is "eighty-six million, five hundred nine thousand, two hundred thirteen".