86970869 has 4 divisors (see below), whose sum is σ = 86989644. Its totient is φ = 86952096.

The previous prime is 86970857. The next prime is 86970883. The reversal of 86970869 is 96807968.

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 82719025 + 4251844 = 9095^2 + 2062^2 .

It is a cyclic number.

It is not a de Polignac number, because 86970869 - 2¹² = 86966773 is a prime.

It is a super-2 number, since 2×86970869² = 15127864109230322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86970869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86970899) 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, 3089 + ... + 13545.

It is an arithmetic number, because the mean of its divisors is an integer number (21747411).

Almost surely, 2^86970869 is an apocalyptic number.

It is an amenable number.

86970869 is a deficient number, since it is larger than the sum of its proper divisors (18775).

86970869 is a wasteful number, since it uses less digits than its factorization.

86970869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18774.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 86970869 is about 9325.8173368343. The cubic root of 86970869 is about 443.0553003847.

The spelling of 86970869 in words is "eighty-six million, nine hundred seventy thousand, eight hundred sixty-nine".