39699780389 has 2 divisors, whose sum is σ = 39699780390. Its totient is φ = 39699780388.

The previous prime is 39699780377. The next prime is 39699780391. The reversal of 39699780389 is 98308799693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30866976100 + 8832804289 = 175690^2 + 93983^2 .

It is a cyclic number.

It is not a de Polignac number, because 39699780389 - 2²⁸ = 39431344933 is a prime.

Together with 39699780391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39699780089) by changing a digit.

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 as a sum of consecutive naturals, namely, 19849890194 + 19849890195.

It is an arithmetic number, because the mean of its divisors is an integer number (19849890195).

Almost surely, 2^39699780389 is an apocalyptic number.

It is an amenable number.

39699780389 is a deficient number, since it is larger than the sum of its proper divisors (1).

39699780389 is an equidigital number, since it uses as much as digits as its factorization.

39699780389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158723712, while the sum is 71.

The spelling of 39699780389 in words is "thirty-nine billion, six hundred ninety-nine million, seven hundred eighty thousand, three hundred eighty-nine".