83907689 has 8 divisors (see below), whose sum is σ = 86191560. Its totient is φ = 81635200.

The previous prime is 83907671. The next prime is 83907697. The reversal of 83907689 is 98670938.

It can be written as a sum of positive squares in 4 ways, for example, as 824464 + 83083225 = 908^2 + 9115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83907689 - 2⁸ = 83907433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83907389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13319 + ... + 18579.

It is an arithmetic number, because the mean of its divisors is an integer number (10773945).

Almost surely, 2^83907689 is an apocalyptic number.

It is an amenable number.

83907689 is a deficient number, since it is larger than the sum of its proper divisors (2283871).

83907689 is a wasteful number, since it uses less digits than its factorization.

83907689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 83907689 is about 9160.1140276745. The cubic root of 83907689 is about 437.7914274911.

The spelling of 83907689 in words is "eighty-three million, nine hundred seven thousand, six hundred eighty-nine".