86220338689 has 3 divisors (see below), whose sum is σ = 86220632323. Its totient is φ = 86220045056.

The previous prime is 86220338647. The next prime is 86220338713. The reversal of 86220338689 is 98683302268.

The square root of 86220338689 is 293633.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 74209932225 + 12010406464 = 272415^2 + 109592^2 .

It is not a de Polignac number, because 86220338689 - 2⁹ = 86220338177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86220338609) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 146817 + ... + 440449.

Almost surely, 2^86220338689 is an apocalyptic number.

86220338689 is the 293633-rd square number.

86220338689 is the 146817-th centered octagonal number.

It is an amenable number.

86220338689 is a deficient number, since it is larger than the sum of its proper divisors (293634).

86220338689 is an frugal number, since it uses more digits than its factorization.

86220338689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587266 (or 293633 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 86220338689 in words is "eighty-six billion, two hundred twenty million, three hundred thirty-eight thousand, six hundred eighty-nine".