86840489 has 4 divisors (see below), whose sum is σ = 87007056. Its totient is φ = 86673924.

The previous prime is 86840483. The next prime is 86840497. The reversal of 86840489 is 98404868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86840489 - 2⁴ = 86840473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86840483) 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, 82499 + ... + 83544.

It is an arithmetic number, because the mean of its divisors is an integer number (21751764).

Almost surely, 2^86840489 is an apocalyptic number.

It is an amenable number.

86840489 is a deficient number, since it is larger than the sum of its proper divisors (166567).

86840489 is a wasteful number, since it uses less digits than its factorization.

86840489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166566.

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 86840489 is about 9318.8244430293. The cubic root of 86840489 is about 442.8337915788.

The spelling of 86840489 in words is "eighty-six million, eight hundred forty thousand, four hundred eighty-nine".