2177009 has 2 divisors, whose sum is σ = 2177010. Its totient is φ = 2177008.

The previous prime is 2176997. The next prime is 2177011. The reversal of 2177009 is 9007712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1216609 + 960400 = 1103^2 + 980^2 .

It is a cyclic number.

It is not a de Polignac number, because 2177009 - 2⁸ = 2176753 is a prime.

Together with 2177011, 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 (2177069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1088504 + 1088505.

It is an arithmetic number, because the mean of its divisors is an integer number (1088505).

2^2177009 is an apocalyptic number.

It is an amenable number.

2177009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2177009 is an equidigital number, since it uses as much as digits as its factorization.

2177009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 2177009 is about 1475.4690779545. The cubic root of 2177009 is about 129.6044981737.

The spelling of 2177009 in words is "two million, one hundred seventy-seven thousand, nine".