39680689 has 2 divisors, whose sum is σ = 39680690. Its totient is φ = 39680688.

The previous prime is 39680677. The next prime is 39680699. The reversal of 39680689 is 98608693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21233664 + 18447025 = 4608^2 + 4295^2 .

It is a cyclic number.

It is not a de Polignac number, because 39680689 - 2⁵ = 39680657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39680609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19840344 + 19840345.

It is an arithmetic number, because the mean of its divisors is an integer number (19840345).

Almost surely, 2^39680689 is an apocalyptic number.

It is an amenable number.

39680689 is a deficient number, since it is larger than the sum of its proper divisors (1).

39680689 is an equidigital number, since it uses as much as digits as its factorization.

39680689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 39680689 is about 6299.2609884017. The cubic root of 39680689 is about 341.0827334852.

The spelling of 39680689 in words is "thirty-nine million, six hundred eighty thousand, six hundred eighty-nine".