86144809 has 4 divisors (see below), whose sum is σ = 86379904. Its totient is φ = 85909716.

The previous prime is 86144789. The next prime is 86144837. The reversal of 86144809 is 90844168.

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 86144809 - 2¹¹ = 86142761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86144869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116997 + ... + 117730.

It is an arithmetic number, because the mean of its divisors is an integer number (21594976).

Almost surely, 2^86144809 is an apocalyptic number.

It is an amenable number.

86144809 is a deficient number, since it is larger than the sum of its proper divisors (235095).

86144809 is a wasteful number, since it uses less digits than its factorization.

86144809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235094.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 86144809 is about 9281.4227896374. The cubic root of 86144809 is about 441.6481044689.

The spelling of 86144809 in words is "eighty-six million, one hundred forty-four thousand, eight hundred nine".