3781489 has 2 divisors, whose sum is σ = 3781490. Its totient is φ = 3781488.

The previous prime is 3781457. The next prime is 3781501. The reversal of 3781489 is 9841873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3168400 + 613089 = 1780^2 + 783^2 .

It is a cyclic number.

It is not a de Polignac number, because 3781489 - 2⁵ = 3781457 is a prime.

It is not a weakly prime, because it can be changed into another prime (3781189) 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, 1890744 + 1890745.

It is an arithmetic number, because the mean of its divisors is an integer number (1890745).

Almost surely, 2^3781489 is an apocalyptic number.

It is an amenable number.

3781489 is a deficient number, since it is larger than the sum of its proper divisors (1).

3781489 is an equidigital number, since it uses as much as digits as its factorization.

3781489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 3781489 is about 1944.6051012995. The cubic root of 3781489 is about 155.7952744014.

The spelling of 3781489 in words is "three million, seven hundred eighty-one thousand, four hundred eighty-nine".