83945864 has 16 divisors (see below), whose sum is σ = 166657500. Its totient is φ = 39503872.

The previous prime is 83945833. The next prime is 83945867. The reversal of 83945864 is 46854938.

It can be written as a sum of positive squares in 2 ways, for example, as 64673764 + 19272100 = 8042^2 + 4390^2 .

It is not an unprimeable number, because it can be changed into a prime (83945867) 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, 308489 + ... + 308760.

Almost surely, 2^83945864 is an apocalyptic number.

It is an amenable number.

83945864 is a deficient number, since it is larger than the sum of its proper divisors (82711636).

83945864 is a wasteful number, since it uses less digits than its factorization.

83945864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617272 (or 617268 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 83945864 is about 9162.1975529891. The cubic root of 83945864 is about 437.8578105764.

The spelling of 83945864 in words is "eighty-three million, nine hundred forty-five thousand, eight hundred sixty-four".