86442747 has 4 divisors (see below), whose sum is σ = 115257000. Its totient is φ = 57628496.

The previous prime is 86442743. The next prime is 86442779. The reversal of 86442747 is 74724468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86442747 - 2² = 86442743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 86442699 and 86442708.

It is not an unprimeable number, because it can be changed into a prime (86442743) 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, 14407122 + ... + 14407127.

It is an arithmetic number, because the mean of its divisors is an integer number (28814250).

Almost surely, 2^86442747 is an apocalyptic number.

86442747 is a deficient number, since it is larger than the sum of its proper divisors (28814253).

86442747 is a wasteful number, since it uses less digits than its factorization.

86442747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28814252.

The product of its digits is 301056, while the sum is 42.

The square root of 86442747 is about 9297.4591690418. The cubic root of 86442747 is about 442.1566758229.

The spelling of 86442747 in words is "eighty-six million, four hundred forty-two thousand, seven hundred forty-seven".