2905949 has 2 divisors, whose sum is σ = 2905950. Its totient is φ = 2905948.

The previous prime is 2905921. The next prime is 2905961. The reversal of 2905949 is 9495092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2502724 + 403225 = 1582^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 2905949 - 2¹² = 2901853 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2905919) 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, 1452974 + 1452975.

It is an arithmetic number, because the mean of its divisors is an integer number (1452975).

2^2905949 is an apocalyptic number.

It is an amenable number.

2905949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2905949 is an equidigital number, since it uses as much as digits as its factorization.

2905949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 2905949 is about 1704.6844282740. The cubic root of 2905949 is about 142.7017599591.

The spelling of 2905949 in words is "two million, nine hundred five thousand, nine hundred forty-nine".