2319509 has 2 divisors, whose sum is σ = 2319510. Its totient is φ = 2319508.

The previous prime is 2319503. The next prime is 2319517. The reversal of 2319509 is 9059132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2316484 + 3025 = 1522^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 2319509 - 2⁸ = 2319253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2319503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1159754 + 1159755.

It is an arithmetic number, because the mean of its divisors is an integer number (1159755).

2^2319509 is an apocalyptic number.

It is an amenable number.

2319509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2319509 is an equidigital number, since it uses as much as digits as its factorization.

2319509 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 29.

The square root of 2319509 is about 1522.9934339977. The cubic root of 2319509 is about 132.3727792757.

The spelling of 2319509 in words is "two million, three hundred nineteen thousand, five hundred nine".