86100821 has 4 divisors (see below), whose sum is σ = 86124192. Its totient is φ = 86077452.

The previous prime is 86100811. The next prime is 86100823. The reversal of 86100821 is 12800168.

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 86100821 - 2¹⁴ = 86084437 is a prime.

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 (86100823) 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, 4811 + ... + 13976.

It is an arithmetic number, because the mean of its divisors is an integer number (21531048).

Almost surely, 2^86100821 is an apocalyptic number.

It is an amenable number.

86100821 is a deficient number, since it is larger than the sum of its proper divisors (23371).

86100821 is a wasteful number, since it uses less digits than its factorization.

86100821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23370.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 86100821 is about 9279.0528072643. The cubic root of 86100821 is about 441.5729189579.

Adding to 86100821 its reverse (12800168), we get a palindrome (98900989).

The spelling of 86100821 in words is "eighty-six million, one hundred thousand, eight hundred twenty-one".