2402909 has 2 divisors, whose sum is σ = 2402910. Its totient is φ = 2402908.

The previous prime is 2402867. The next prime is 2402921. The reversal of 2402909 is 9092042.

2402909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2325625 + 77284 = 1525^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 2402909 - 2²⁰ = 1354333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2402999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1201454 + 1201455.

It is an arithmetic number, because the mean of its divisors is an integer number (1201455).

2^2402909 is an apocalyptic number.

It is an amenable number.

2402909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2402909 is an equidigital number, since it uses as much as digits as its factorization.

2402909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2402909 is about 1550.1319298692. The cubic root of 2402909 is about 133.9406620771.

The spelling of 2402909 in words is "two million, four hundred two thousand, nine hundred nine".