2039509 has 2 divisors, whose sum is σ = 2039510. Its totient is φ = 2039508.

The previous prime is 2039501. The next prime is 2039549. The reversal of 2039509 is 9059302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1898884 + 140625 = 1378^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 2039509 - 2³ = 2039501 is a prime.

It is a super-2 number, since 2×2039509² = 8319193922162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2039501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1019754 + 1019755.

It is an arithmetic number, because the mean of its divisors is an integer number (1019755).

2^2039509 is an apocalyptic number.

It is an amenable number.

2039509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2039509 is an equidigital number, since it uses as much as digits as its factorization.

2039509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 2039509 is about 1428.1137909845. The cubic root of 2039509 is about 126.8163381575.

The spelling of 2039509 in words is "two million, thirty-nine thousand, five hundred nine".