83842505 has 8 divisors (see below), whose sum is σ = 100782024. Its totient is φ = 66960000.

The previous prime is 83842483. The next prime is 83842511. The reversal of 83842505 is 50524838.

It can be written as a sum of positive squares in 4 ways, for example, as 38576521 + 45265984 = 6211^2 + 6728^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83842505 - 2⁶ = 83842441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10946 + ... + 16955.

It is an arithmetic number, because the mean of its divisors is an integer number (12597753).

Almost surely, 2^83842505 is an apocalyptic number.

It is an amenable number.

83842505 is a deficient number, since it is larger than the sum of its proper divisors (16939519).

83842505 is a wasteful number, since it uses less digits than its factorization.

83842505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28507.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 83842505 is about 9156.5553020773. Note that the first 3 decimals coincide. The cubic root of 83842505 is about 437.6780314896.

The spelling of 83842505 in words is "eighty-three million, eight hundred forty-two thousand, five hundred five".