86821473 has 8 divisors (see below), whose sum is σ = 117946368. Its totient is φ = 56788784.

The previous prime is 86821459. The next prime is 86821487. The reversal of 86821473 is 37412868.

It is an interprime number because it is at equal distance from previous prime (86821459) and next prime (86821487).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86821473 - 2⁹ = 86820961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86821433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272865 + ... + 273182.

It is an arithmetic number, because the mean of its divisors is an integer number (14743296).

Almost surely, 2^86821473 is an apocalyptic number.

It is an amenable number.

86821473 is a deficient number, since it is larger than the sum of its proper divisors (31124895).

86821473 is a wasteful number, since it uses less digits than its factorization.

86821473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546103.

The product of its digits is 64512, while the sum is 39.

The square root of 86821473 is about 9317.8040868007. The cubic root of 86821473 is about 442.8014658660.

The spelling of 86821473 in words is "eighty-six million, eight hundred twenty-one thousand, four hundred seventy-three".