2907889 has 2 divisors, whose sum is σ = 2907890. Its totient is φ = 2907888.

The previous prime is 2907887. The next prime is 2907899. The reversal of 2907889 is 9887092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1937664 + 970225 = 1392^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2907889 - 2¹ = 2907887 is a prime.

Together with 2907887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2907881) 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, 1453944 + 1453945.

It is an arithmetic number, because the mean of its divisors is an integer number (1453945).

2^2907889 is an apocalyptic number.

It is an amenable number.

2907889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2907889 is an equidigital number, since it uses as much as digits as its factorization.

2907889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 2907889 is about 1705.2533536105. The cubic root of 2907889 is about 142.7335086043.

The spelling of 2907889 in words is "two million, nine hundred seven thousand, eight hundred eighty-nine".