2257909 has 2 divisors, whose sum is σ = 2257910. Its totient is φ = 2257908.

The previous prime is 2257883. The next prime is 2257939. The reversal of 2257909 is 9097522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2241009 + 16900 = 1497^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257909 - 2⁵ = 2257877 is a prime.

It is an Ulam number.

2257909 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2257939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128954 + 1128955.

It is an arithmetic number, because the mean of its divisors is an integer number (1128955).

2^2257909 is an apocalyptic number.

It is an amenable number.

2257909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257909 is an equidigital number, since it uses as much as digits as its factorization.

2257909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 2257909 is about 1502.6340206451. The cubic root of 2257909 is about 131.1904267814.

The spelling of 2257909 in words is "two million, two hundred fifty-seven thousand, nine hundred nine".