83481785 has 4 divisors (see below), whose sum is σ = 100178148. Its totient is φ = 66785424.

The previous prime is 83481773. The next prime is 83481787. The reversal of 83481785 is 58718438.

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

It can be written as a sum of positive squares in 2 ways, for example, as 66275881 + 17205904 = 8141^2 + 4148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83481785 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83481787) 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, 8348174 + ... + 8348183.

It is an arithmetic number, because the mean of its divisors is an integer number (25044537).

Almost surely, 2^83481785 is an apocalyptic number.

It is an amenable number.

83481785 is a deficient number, since it is larger than the sum of its proper divisors (16696363).

83481785 is a wasteful number, since it uses less digits than its factorization.

83481785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16696362.

The product of its digits is 215040, while the sum is 44.

The square root of 83481785 is about 9136.8367064318. The cubic root of 83481785 is about 437.0494474573.

The spelling of 83481785 in words is "eighty-three million, four hundred eighty-one thousand, seven hundred eighty-five".