3780509 has 2 divisors, whose sum is σ = 3780510. Its totient is φ = 3780508.

The previous prime is 3780503. The next prime is 3780521. The reversal of 3780509 is 9050873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2464900 + 1315609 = 1570^2 + 1147^2 .

It is a cyclic number.

It is not a de Polignac number, because 3780509 - 2¹⁶ = 3714973 is a prime.

It is a Sophie Germain 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 (3780503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890254 + 1890255.

It is an arithmetic number, because the mean of its divisors is an integer number (1890255).

Almost surely, 2^3780509 is an apocalyptic number.

It is an amenable number.

3780509 is a deficient number, since it is larger than the sum of its proper divisors (1).

3780509 is an equidigital number, since it uses as much as digits as its factorization.

3780509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 3780509 is about 1944.3531057912. The cubic root of 3780509 is about 155.7818147510.

The spelling of 3780509 in words is "three million, seven hundred eighty thousand, five hundred nine".