86786573 has 4 divisors (see below), whose sum is σ = 87645948. Its totient is φ = 85927200.

The previous prime is 86786537. The next prime is 86786611. The reversal of 86786573 is 37568768.

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 69588964 + 17197609 = 8342^2 + 4147^2 .

It is a cyclic number.

It is not a de Polignac number, because 86786573 - 2¹⁰ = 86785549 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 (86786533) 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, 429536 + ... + 429737.

It is an arithmetic number, because the mean of its divisors is an integer number (21911487).

Almost surely, 2^86786573 is an apocalyptic number.

It is an amenable number.

86786573 is a deficient number, since it is larger than the sum of its proper divisors (859375).

86786573 is a wasteful number, since it uses less digits than its factorization.

86786573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859374.

The product of its digits is 1693440, while the sum is 50.

The square root of 86786573 is about 9315.9311397197. The cubic root of 86786573 is about 442.7421263126.

It can be divided in two parts, 8678 and 6573, that added together give a palindrome (15251).

The spelling of 86786573 in words is "eighty-six million, seven hundred eighty-six thousand, five hundred seventy-three".