2669509 has 2 divisors, whose sum is σ = 2669510. Its totient is φ = 2669508.

The previous prime is 2669507. The next prime is 2669521. The reversal of 2669509 is 9059662.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2102500 + 567009 = 1450^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 2669509 - 2¹ = 2669507 is a prime.

Together with 2669507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2669507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334754 + 1334755.

It is an arithmetic number, because the mean of its divisors is an integer number (1334755).

2^2669509 is an apocalyptic number.

It is an amenable number.

2669509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2669509 is an equidigital number, since it uses as much as digits as its factorization.

2669509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 2669509 is about 1633.8632133689. The cubic root of 2669509 is about 138.7215064721.

The spelling of 2669509 in words is "two million, six hundred sixty-nine thousand, five hundred nine".