86144893 has 4 divisors (see below), whose sum is σ = 86296860. Its totient is φ = 85992928.

The previous prime is 86144887. The next prime is 86144909. The reversal of 86144893 is 39844168.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50168889 + 35976004 = 7083^2 + 5998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86144893 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 (86144873) 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, 75130 + ... + 76267.

It is an arithmetic number, because the mean of its divisors is an integer number (21574215).

Almost surely, 2^86144893 is an apocalyptic number.

It is an amenable number.

86144893 is a deficient number, since it is larger than the sum of its proper divisors (151967).

86144893 is a wasteful number, since it uses less digits than its factorization.

86144893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151966.

The product of its digits is 165888, while the sum is 43.

The square root of 86144893 is about 9281.4273148046. The cubic root of 86144893 is about 441.6482480195.

It can be divided in two parts, 861 and 44893, that added together give a palindrome (45754).

The spelling of 86144893 in words is "eighty-six million, one hundred forty-four thousand, eight hundred ninety-three".