2861849 has 2 divisors, whose sum is σ = 2861850. Its totient is φ = 2861848.

The previous prime is 2861809. The next prime is 2861851. The reversal of 2861849 is 9481682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2458624 + 403225 = 1568^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 2861849 - 2¹² = 2857753 is a prime.

Together with 2861851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2861809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1430924 + 1430925.

It is an arithmetic number, because the mean of its divisors is an integer number (1430925).

2^2861849 is an apocalyptic number.

It is an amenable number.

2861849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2861849 is an equidigital number, since it uses as much as digits as its factorization.

2861849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 2861849 is about 1691.7000325117. The cubic root of 2861849 is about 141.9762077443.

The spelling of 2861849 in words is "two million, eight hundred sixty-one thousand, eight hundred forty-nine".