83687668 has 24 divisors (see below), whose sum is σ = 155465352. Its totient is φ = 39281664.

The previous prime is 83687657. The next prime is 83687717. The reversal of 83687668 is 86678638.

It can be written as a sum of positive squares in 4 ways, for example, as 34715664 + 48972004 = 5892^2 + 6998^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29730 + ... + 32422.

It is an arithmetic number, because the mean of its divisors is an integer number (6477723).

Almost surely, 2^83687668 is an apocalyptic number.

It is an amenable number.

83687668 is a deficient number, since it is larger than the sum of its proper divisors (71777684).

83687668 is a wasteful number, since it uses less digits than its factorization.

83687668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171 (or 3169 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 52.

The square root of 83687668 is about 9148.0964140088. The cubic root of 83687668 is about 437.4084366750.

The spelling of 83687668 in words is "eighty-three million, six hundred eighty-seven thousand, six hundred sixty-eight".