83959109 has 4 divisors (see below), whose sum is σ = 90417516. Its totient is φ = 77500704.

The previous prime is 83959097. The next prime is 83959121. The reversal of 83959109 is 90195938.

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

It is an interprime number because it is at equal distance from previous prime (83959097) and next prime (83959121).

It can be written as a sum of positive squares in 2 ways, for example, as 7344100 + 76615009 = 2710^2 + 8753^2 .

It is a cyclic number.

It is not a de Polignac number, because 83959109 - 2⁴ = 83959093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83959109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83959009) 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, 3229184 + ... + 3229209.

It is an arithmetic number, because the mean of its divisors is an integer number (22604379).

Almost surely, 2^83959109 is an apocalyptic number.

It is an amenable number.

83959109 is a deficient number, since it is larger than the sum of its proper divisors (6458407).

83959109 is a wasteful number, since it uses less digits than its factorization.

83959109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6458406.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 83959109 is about 9162.9203314227. The cubic root of 83959109 is about 437.8808378046.

The spelling of 83959109 in words is "eighty-three million, nine hundred fifty-nine thousand, one hundred nine".