2138291 has 2 divisors, whose sum is σ = 2138292. Its totient is φ = 2138290.

The previous prime is 2138263. The next prime is 2138321. The reversal of 2138291 is 1928312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2138291 - 2¹⁴ = 2121907 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2138291.

It is not a weakly prime, because it can be changed into another prime (2138221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069145 + 1069146.

It is an arithmetic number, because the mean of its divisors is an integer number (1069146).

2^2138291 is an apocalyptic number.

2138291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138291 is an equidigital number, since it uses as much as digits as its factorization.

2138291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 2138291 is about 1462.2896429914. The cubic root of 2138291 is about 128.8315611030.

The spelling of 2138291 in words is "two million, one hundred thirty-eight thousand, two hundred ninety-one".