3780389 has 2 divisors, whose sum is σ = 3780390. Its totient is φ = 3780388.

The previous prime is 3780377. The next prime is 3780391. The reversal of 3780389 is 9830873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3771364 + 9025 = 1942^2 + 95^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3780389 is a prime.

It is a Sophie Germain prime.

Together with 3780391, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3780319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890194 + 1890195.

It is an arithmetic number, because the mean of its divisors is an integer number (1890195).

Almost surely, 2^3780389 is an apocalyptic number.

It is an amenable number.

3780389 is a deficient number, since it is larger than the sum of its proper divisors (1).

3780389 is an equidigital number, since it uses as much as digits as its factorization.

3780389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 3780389 is about 1944.3222469539. The cubic root of 3780389 is about 155.7801664707.

The spelling of 3780389 in words is "three million, seven hundred eighty thousand, three hundred eighty-nine".