86543869 has 4 divisors (see below), whose sum is σ = 86587200. Its totient is φ = 86500540.

The previous prime is 86543861. The next prime is 86543881. The reversal of 86543869 is 96834568.

It is a happy number.

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 86543869 - 2³ = 86543861 is a prime.

It is a super-2 number, since 2×86543869² = 14979682522978322, 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 (86543861) 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, 18517 + ... + 22714.

It is an arithmetic number, because the mean of its divisors is an integer number (21646800).

Almost surely, 2^86543869 is an apocalyptic number.

It is an amenable number.

86543869 is a deficient number, since it is larger than the sum of its proper divisors (43331).

86543869 is a wasteful number, since it uses less digits than its factorization.

86543869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43330.

The product of its digits is 1244160, while the sum is 49.

The square root of 86543869 is about 9302.8957319751. The cubic root of 86543869 is about 442.3290224355.

The spelling of 86543869 in words is "eighty-six million, five hundred forty-three thousand, eight hundred sixty-nine".