86724538069 has 4 divisors (see below), whose sum is σ = 93395656396. Its totient is φ = 80053419744.

The previous prime is 86724538051. The next prime is 86724538127. The reversal of 86724538069 is 96083542768.

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 3728689969 + 82995848100 = 61063^2 + 288090^2 .

It is a cyclic number.

It is not a de Polignac number, because 86724538069 - 2⁷ = 86724537941 is a prime.

It is a super-2 number, since 2×86724538069² (a number of 23 digits) 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 (86724538469) 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, 3335559144 + ... + 3335559169.

It is an arithmetic number, because the mean of its divisors is an integer number (23348914099).

Almost surely, 2^86724538069 is an apocalyptic number.

It is an amenable number.

86724538069 is a deficient number, since it is larger than the sum of its proper divisors (6671118327).

86724538069 is a wasteful number, since it uses less digits than its factorization.

86724538069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671118326.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 86724538069 in words is "eighty-six billion, seven hundred twenty-four million, five hundred thirty-eight thousand, sixty-nine".