83785317 has 16 divisors (see below), whose sum is σ = 139279872. Its totient is φ = 43524720.

The previous prime is 83785313. The next prime is 83785381. The reversal of 83785317 is 71358738.

It is not a de Polignac number, because 83785317 - 2² = 83785313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83785313) 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 15 ways as a sum of consecutive naturals, for example, 181123 + ... + 181584.

It is an arithmetic number, because the mean of its divisors is an integer number (8704992).

Almost surely, 2^83785317 is an apocalyptic number.

It is an amenable number.

83785317 is a deficient number, since it is larger than the sum of its proper divisors (55494555).

83785317 is a wasteful number, since it uses less digits than its factorization.

83785317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362728.

The product of its digits is 141120, while the sum is 42.

The square root of 83785317 is about 9153.4319793179. The cubic root of 83785317 is about 437.5784971531.

It can be divided in two parts, 8378 and 5317, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 83785317 in words is "eighty-three million, seven hundred eighty-five thousand, three hundred seventeen".