86144069 has 4 divisors (see below), whose sum is σ = 93975360. Its totient is φ = 78312780.

The previous prime is 86144063. The next prime is 86144077. The reversal of 86144069 is 96044168.

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 86144069 - 2¹⁶ = 86078533 is a prime.

It is a super-2 number, since 2×86144069² = 14841601247753522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86144063) 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, 3915629 + ... + 3915650.

It is an arithmetic number, because the mean of its divisors is an integer number (23493840).

Almost surely, 2^86144069 is an apocalyptic number.

It is an amenable number.

86144069 is a deficient number, since it is larger than the sum of its proper divisors (7831291).

86144069 is a wasteful number, since it uses less digits than its factorization.

86144069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7831290.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 86144069 is about 9281.3829249741. The cubic root of 86144069 is about 441.6468398520.

Subtracting 86144069 from its reverse (96044168), we obtain a palindrome (9900099).

The spelling of 86144069 in words is "eighty-six million, one hundred forty-four thousand, sixty-nine".