2981897 has 2 divisors, whose sum is σ = 2981898. Its totient is φ = 2981896.

The previous prime is 2981887. The next prime is 2981899. The reversal of 2981897 is 7981892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2524921 + 456976 = 1589^2 + 676^2 .

It is a cyclic number.

It is not a de Polignac number, because 2981897 - 2¹² = 2977801 is a prime.

Together with 2981899, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (2981899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1490948 + 1490949.

It is an arithmetic number, because the mean of its divisors is an integer number (1490949).

2^2981897 is an apocalyptic number.

It is an amenable number.

2981897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2981897 is an equidigital number, since it uses as much as digits as its factorization.

2981897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 44.

The square root of 2981897 is about 1726.8170140464. The cubic root of 2981897 is about 143.9342710571.

The spelling of 2981897 in words is "two million, nine hundred eighty-one thousand, eight hundred ninety-seven".