86643473 has 4 divisors (see below), whose sum is σ = 99021120. Its totient is φ = 74265828.

The previous prime is 86643467. The next prime is 86643493. The reversal of 86643473 is 37434668.

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 not a de Polignac number, because 86643473 - 2⁴ = 86643457 is a prime.

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 86643473.

It is not an unprimeable number, because it can be changed into a prime (86643463) 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, 6188813 + ... + 6188826.

It is an arithmetic number, because the mean of its divisors is an integer number (24755280).

Almost surely, 2^86643473 is an apocalyptic number.

It is an amenable number.

86643473 is a deficient number, since it is larger than the sum of its proper divisors (12377647).

86643473 is a wasteful number, since it uses less digits than its factorization.

86643473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12377646.

The product of its digits is 290304, while the sum is 41.

The square root of 86643473 is about 9308.2475794319. The cubic root of 86643473 is about 442.4986506603.

The spelling of 86643473 in words is "eighty-six million, six hundred forty-three thousand, four hundred seventy-three".