83804945 has 12 divisors (see below), whose sum is σ = 116985204. Its totient is φ = 57466080.

The previous prime is 83804927. The next prime is 83804947. The reversal of 83804945 is 54940838.

It can be written as a sum of positive squares in 2 ways, for example, as 49885969 + 33918976 = 7063^2 + 5824^2 .

It is not a de Polignac number, because 83804945 - 2⁶ = 83804881 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83804947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170786 + ... + 171275.

It is an arithmetic number, because the mean of its divisors is an integer number (9748767).

Almost surely, 2^83804945 is an apocalyptic number.

It is an amenable number.

83804945 is a deficient number, since it is larger than the sum of its proper divisors (33180259).

83804945 is a wasteful number, since it uses less digits than its factorization.

83804945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342080 (or 342073 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 83804945 is about 9154.5040826907. The cubic root of 83804945 is about 437.6126643177.

The spelling of 83804945 in words is "eighty-three million, eight hundred four thousand, nine hundred forty-five".