86877869 has 4 divisors (see below), whose sum is σ = 93560796. Its totient is φ = 80194944.

The previous prime is 86877851. The next prime is 86877883. The reversal of 86877869 is 96877868.

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 5697769 + 81180100 = 2387^2 + 9010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86877869 is a prime.

It is a super-2 number, since 2×86877869² = 15095528243962322, 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 (86877809) 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, 3341444 + ... + 3341469.

It is an arithmetic number, because the mean of its divisors is an integer number (23390199).

Almost surely, 2^86877869 is an apocalyptic number.

It is an amenable number.

86877869 is a deficient number, since it is larger than the sum of its proper divisors (6682927).

86877869 is a wasteful number, since it uses less digits than its factorization.

86877869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682926.

The product of its digits is 8128512, while the sum is 59.

The square root of 86877869 is about 9320.8298450299. The cubic root of 86877869 is about 442.8973209026.

Subtracting 86877869 from its reverse (96877868), we obtain a palindrome (9999999).

The spelling of 86877869 in words is "eighty-six million, eight hundred seventy-seven thousand, eight hundred sixty-nine".