2138207 has 2 divisors, whose sum is σ = 2138208. Its totient is φ = 2138206.

The previous prime is 2138197. The next prime is 2138221. The reversal of 2138207 is 7028312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2138207 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2138407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069103 + 1069104.

It is an arithmetic number, because the mean of its divisors is an integer number (1069104).

2^2138207 is an apocalyptic number.

2138207 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138207 is an equidigital number, since it uses as much as digits as its factorization.

2138207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2138207 is about 1462.2609206294. The cubic root of 2138207 is about 128.8298740871.

The spelling of 2138207 in words is "two million, one hundred thirty-eight thousand, two hundred seven".