1383509 has 2 divisors, whose sum is σ = 1383510. Its totient is φ = 1383508.

The previous prime is 1383497. The next prime is 1383517. The reversal of 1383509 is 9053831.

1383509 is nontrivially palindromic in base 8.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1322500 + 61009 = 1150^2 + 247^2 .

It is a cyclic number.

It is not a de Polignac number, because 1383509 - 2⁴ = 1383493 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 (1383589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691754 + 691755.

It is an arithmetic number, because the mean of its divisors is an integer number (691755).

2^1383509 is an apocalyptic number.

It is an amenable number.

1383509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1383509 is an equidigital number, since it uses as much as digits as its factorization.

1383509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1383509 is about 1176.2265938160. The cubic root of 1383509 is about 111.4279129450.

The spelling of 1383509 in words is "one million, three hundred eighty-three thousand, five hundred nine".