2857949 has 2 divisors, whose sum is σ = 2857950. Its totient is φ = 2857948.

The previous prime is 2857937. The next prime is 2857951. The reversal of 2857949 is 9497582.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2856100 + 1849 = 1690^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 2857949 - 2⁸ = 2857693 is a prime.

Together with 2857951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2857849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428974 + 1428975.

It is an arithmetic number, because the mean of its divisors is an integer number (1428975).

2^2857949 is an apocalyptic number.

It is an amenable number.

2857949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857949 is an equidigital number, since it uses as much as digits as its factorization.

2857949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 2857949 is about 1690.5469529120. The cubic root of 2857949 is about 141.9116854811.

The spelling of 2857949 in words is "two million, eight hundred fifty-seven thousand, nine hundred forty-nine".