86419521 has 32 divisors (see below), whose sum is σ = 131725440. Its totient is φ = 55972800.

The previous prime is 86419477. The next prime is 86419549. The reversal of 86419521 is 12591468.

86419521 is a `hidden beast` number, since 8 + 641 + 9 + 5 + 2 + 1 = 666.

It is not a de Polignac number, because 86419521 - 2⁷ = 86419393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86419321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187231 + ... + 187691.

It is an arithmetic number, because the mean of its divisors is an integer number (4116420).

Almost surely, 2^86419521 is an apocalyptic number.

It is an amenable number.

86419521 is a deficient number, since it is larger than the sum of its proper divisors (45305919).

86419521 is a wasteful number, since it uses less digits than its factorization.

86419521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 648 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 86419521 is about 9296.2100342021. The cubic root of 86419521 is about 442.1170717643.

The spelling of 86419521 in words is "eighty-six million, four hundred nineteen thousand, five hundred twenty-one".