2391071 has 2 divisors, whose sum is σ = 2391072. Its totient is φ = 2391070.

The previous prime is 2391049. The next prime is 2391083. The reversal of 2391071 is 1701932.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2391071 is a prime.

It is a Sophie Germain 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 (2391001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195535 + 1195536.

It is an arithmetic number, because the mean of its divisors is an integer number (1195536).

2^2391071 is an apocalyptic number.

2391071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391071 is an equidigital number, since it uses as much as digits as its factorization.

2391071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 2391071 is about 1546.3088307321. The cubic root of 2391071 is about 133.7203457127.

The spelling of 2391071 in words is "two million, three hundred ninety-one thousand, seventy-one".