83870039 has 4 divisors (see below), whose sum is σ = 91494600. Its totient is φ = 76245480.

The previous prime is 83870021. The next prime is 83870041. The reversal of 83870039 is 93007838.

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 83870039 - 2²⁰ = 82821463 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83869984 and 83870011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83870939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3812264 + ... + 3812285.

It is an arithmetic number, because the mean of its divisors is an integer number (22873650).

Almost surely, 2^83870039 is an apocalyptic number.

83870039 is a deficient number, since it is larger than the sum of its proper divisors (7624561).

83870039 is a wasteful number, since it uses less digits than its factorization.

83870039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7624560.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 83870039 is about 9158.0586916660. The cubic root of 83870039 is about 437.7259376121.

The spelling of 83870039 in words is "eighty-three million, eight hundred seventy thousand, thirty-nine".