86451689 has 4 divisors (see below), whose sum is σ = 86757456. Its totient is φ = 86145924.

The previous prime is 86451683. The next prime is 86451713. The reversal of 86451689 is 98615468.

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 86451689 - 2⁸ = 86451433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86451683) 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, 152459 + ... + 153024.

It is an arithmetic number, because the mean of its divisors is an integer number (21689364).

Almost surely, 2^86451689 is an apocalyptic number.

It is an amenable number.

86451689 is a deficient number, since it is larger than the sum of its proper divisors (305767).

86451689 is a wasteful number, since it uses less digits than its factorization.

86451689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305766.

The product of its digits is 414720, while the sum is 47.

The square root of 86451689 is about 9297.9400406757. The cubic root of 86451689 is about 442.1719214771.

The spelling of 86451689 in words is "eighty-six million, four hundred fifty-one thousand, six hundred eighty-nine".