2901209 has 2 divisors, whose sum is σ = 2901210. Its totient is φ = 2901208.

The previous prime is 2901193. The next prime is 2901211. The reversal of 2901209 is 9021092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2795584 + 105625 = 1672^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 2901209 - 2⁴ = 2901193 is a prime.

Together with 2901211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2901229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1450604 + 1450605.

It is an arithmetic number, because the mean of its divisors is an integer number (1450605).

2^2901209 is an apocalyptic number.

It is an amenable number.

2901209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2901209 is an equidigital number, since it uses as much as digits as its factorization.

2901209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2901209 is about 1703.2935742261. The cubic root of 2901209 is about 142.6241290433.

The spelling of 2901209 in words is "two million, nine hundred one thousand, two hundred nine".