2805949 has 2 divisors, whose sum is σ = 2805950. Its totient is φ = 2805948.

The previous prime is 2805923. The next prime is 2805967. The reversal of 2805949 is 9495082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2805625 + 324 = 1675^2 + 18^2 .

It is a cyclic number.

It is not a de Polignac number, because 2805949 - 2¹³ = 2797757 is a prime.

2805949 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2805989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402974 + 1402975.

It is an arithmetic number, because the mean of its divisors is an integer number (1402975).

2^2805949 is an apocalyptic number.

It is an amenable number.

2805949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805949 is an equidigital number, since it uses as much as digits as its factorization.

2805949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 2805949 is about 1675.0967136258. The cubic root of 2805949 is about 141.0457239835.

The spelling of 2805949 in words is "two million, eight hundred five thousand, nine hundred forty-nine".