86336021 has 4 divisors (see below), whose sum is σ = 86407500. Its totient is φ = 86264544.

The previous prime is 86336017. The next prime is 86336051. The reversal of 86336021 is 12063368.

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 46771921 + 39564100 = 6839^2 + 6290^2 .

It is a cyclic number.

It is not a de Polignac number, because 86336021 - 2² = 86336017 is a prime.

It is a super-2 number, since 2×86336021² = 14907817044224882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86336051) 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, 33896 + ... + 36353.

It is an arithmetic number, because the mean of its divisors is an integer number (21601875).

Almost surely, 2^86336021 is an apocalyptic number.

It is an amenable number.

86336021 is a deficient number, since it is larger than the sum of its proper divisors (71479).

86336021 is a wasteful number, since it uses less digits than its factorization.

86336021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71478.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 86336021 is about 9291.7178713088. The cubic root of 86336021 is about 441.9746322193.

Adding to 86336021 its reverse (12063368), we get a palindrome (98399389).

The spelling of 86336021 in words is "eighty-six million, three hundred thirty-six thousand, twenty-one".