2851949 has 2 divisors, whose sum is σ = 2851950. Its totient is φ = 2851948.

The previous prime is 2851943. The next prime is 2851951. The reversal of 2851949 is 9491582.

2851949 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., 2706025 + 145924 = 1645^2 + 382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2851949 is a prime.

It is a super-2 number, since 2×2851949² = 16267226197202, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2851951, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2851943) 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, 1425974 + 1425975.

It is an arithmetic number, because the mean of its divisors is an integer number (1425975).

2^2851949 is an apocalyptic number.

It is an amenable number.

2851949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2851949 is an equidigital number, since it uses as much as digits as its factorization.

2851949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The square root of 2851949 is about 1688.7714469401. The cubic root of 2851949 is about 141.8123057429.

The spelling of 2851949 in words is "two million, eight hundred fifty-one thousand, nine hundred forty-nine".