2973809 has 2 divisors, whose sum is σ = 2973810. Its totient is φ = 2973808.

The previous prime is 2973787. The next prime is 2973833. The reversal of 2973809 is 9083792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600225 + 1373584 = 1265^2 + 1172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2973809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2973889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1486904 + 1486905.

It is an arithmetic number, because the mean of its divisors is an integer number (1486905).

2^2973809 is an apocalyptic number.

It is an amenable number.

2973809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2973809 is an equidigital number, since it uses as much as digits as its factorization.

2973809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 2973809 is about 1724.4735428530. The cubic root of 2973809 is about 143.8040190174.

The spelling of 2973809 in words is "two million, nine hundred seventy-three thousand, eight hundred nine".