83961785 has 4 divisors (see below), whose sum is σ = 100754148. Its totient is φ = 67169424.

The previous prime is 83961751. The next prime is 83961797. The reversal of 83961785 is 58716938.

It is a happy number.

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 20647936 + 63313849 = 4544^2 + 7957^2 .

It is a cyclic number.

It is not a de Polignac number, because 83961785 - 2⁸ = 83961529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8396174 + ... + 8396183.

It is an arithmetic number, because the mean of its divisors is an integer number (25188537).

Almost surely, 2^83961785 is an apocalyptic number.

It is an amenable number.

83961785 is a deficient number, since it is larger than the sum of its proper divisors (16792363).

83961785 is a wasteful number, since it uses less digits than its factorization.

83961785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16792362.

The product of its digits is 362880, while the sum is 47.

The square root of 83961785 is about 9163.0663535740. The cubic root of 83961785 is about 437.8854898973.

The spelling of 83961785 in words is "eighty-three million, nine hundred sixty-one thousand, seven hundred eighty-five".