86390545 has 4 divisors (see below), whose sum is σ = 103668660. Its totient is φ = 69112432.

The previous prime is 86390531. The next prime is 86390581. The reversal of 86390545 is 54509368.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54037201 + 32353344 = 7351^2 + 5688^2 .

It is a cyclic number.

It is not a de Polignac number, because 86390545 - 2⁷ = 86390417 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 86390498 and 86390507.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8639050 + ... + 8639059.

It is an arithmetic number, because the mean of its divisors is an integer number (25917165).

Almost surely, 2^86390545 is an apocalyptic number.

It is an amenable number.

86390545 is a deficient number, since it is larger than the sum of its proper divisors (17278115).

86390545 is a wasteful number, since it uses less digits than its factorization.

86390545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17278114.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 86390545 is about 9294.6514189613. The cubic root of 86390545 is about 442.0676530829.

The spelling of 86390545 in words is "eighty-six million, three hundred ninety thousand, five hundred forty-five".