2391671 has 2 divisors, whose sum is σ = 2391672. Its totient is φ = 2391670.

The previous prime is 2391637. The next prime is 2391691. The reversal of 2391671 is 1761932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2391671 - 2¹⁸ = 2129527 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₁₇₅₇₃₆ and since 2391671 and 175736 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195835 + 1195836.

It is an arithmetic number, because the mean of its divisors is an integer number (1195836).

2^2391671 is an apocalyptic number.

2391671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391671 is an equidigital number, since it uses as much as digits as its factorization.

2391671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 2391671 is about 1546.5028289661. The cubic root of 2391671 is about 133.7315297521.

The spelling of 2391671 in words is "two million, three hundred ninety-one thousand, six hundred seventy-one".