86728308397 has 4 divisors (see below), whose sum is σ = 86732118396. Its totient is φ = 86724498400.

The previous prime is 86728308347. The next prime is 86728308461. The reversal of 86728308397 is 79380382768.

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 59139430596 + 27588877801 = 243186^2 + 166099^2 .

It is a cyclic number.

It is not a de Polignac number, because 86728308397 - 2⁷ = 86728308269 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 (86728308307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870648 + ... + 1916449.

It is an arithmetic number, because the mean of its divisors is an integer number (21683029599).

Almost surely, 2^86728308397 is an apocalyptic number.

It is an amenable number.

86728308397 is a deficient number, since it is larger than the sum of its proper divisors (3809999).

86728308397 is a wasteful number, since it uses less digits than its factorization.

86728308397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809998.

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 86728308397 in words is "eighty-six billion, seven hundred twenty-eight million, three hundred eight thousand, three hundred ninety-seven".