83731385 has 16 divisors (see below), whose sum is σ = 110367360. Its totient is φ = 60698880.

The previous prime is 83731379. The next prime is 83731387. The reversal of 83731385 is 58313738.

It is a happy number.

It is not a de Polignac number, because 83731385 - 2⁴ = 83731369 is a prime.

It is a super-3 number, since 3×83731385³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (83731387) 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, 16976 + ... + 21345.

It is an arithmetic number, because the mean of its divisors is an integer number (6897960).

Almost surely, 2^83731385 is an apocalyptic number.

It is an amenable number.

83731385 is a deficient number, since it is larger than the sum of its proper divisors (26635975).

83731385 is a wasteful number, since it uses less digits than its factorization.

83731385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38368.

The product of its digits is 60480, while the sum is 38.

The square root of 83731385 is about 9150.4855062450. The cubic root of 83731385 is about 437.4845883006.

It can be divided in two parts, 83731 and 385, that multiplied together give a triangular number (32236435 = T₈₀₂₉).

The spelling of 83731385 in words is "eighty-three million, seven hundred thirty-one thousand, three hundred eighty-five".