8540039 has 4 divisors (see below), whose sum is σ = 8623056. Its totient is φ = 8457024.

The previous prime is 8540033. The next prime is 8540047. The reversal of 8540039 is 9300458.

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 8540039 - 2¹⁶ = 8474503 is a prime.

It is a super-2 number, since 2×8540039² = 145864532243042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8539993 and 8540020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8540033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41354 + ... + 41559.

It is an arithmetic number, because the mean of its divisors is an integer number (2155764).

Almost surely, 2^8540039 is an apocalyptic number.

8540039 is a deficient number, since it is larger than the sum of its proper divisors (83017).

8540039 is a wasteful number, since it uses less digits than its factorization.

8540039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83016.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 8540039 is about 2922.3345119955. The cubic root of 8540039 is about 204.4026952028.

The spelling of 8540039 in words is "eight million, five hundred forty thousand, thirty-nine".