86810389 has 4 divisors (see below), whose sum is σ = 86834700. Its totient is φ = 86786080.

The previous prime is 86810387. The next prime is 86810401. The reversal of 86810389 is 98301868.

It is a happy number.

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 38229489 + 48580900 = 6183^2 + 6970^2 .

It is a cyclic number.

It is not a de Polignac number, because 86810389 - 2¹ = 86810387 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 (86810387) 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, 5632 + ... + 14329.

It is an arithmetic number, because the mean of its divisors is an integer number (21708675).

Almost surely, 2^86810389 is an apocalyptic number.

It is an amenable number.

86810389 is a deficient number, since it is larger than the sum of its proper divisors (24311).

86810389 is a wasteful number, since it uses less digits than its factorization.

86810389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24310.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 86810389 is about 9317.2092924867. The cubic root of 86810389 is about 442.7826217554.

The spelling of 86810389 in words is "eighty-six million, eight hundred ten thousand, three hundred eighty-nine".