2026391 has 2 divisors, whose sum is σ = 2026392. Its totient is φ = 2026390.

The previous prime is 2026373. The next prime is 2026393. The reversal of 2026391 is 1936202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2026391 - 2⁶ = 2026327 is a prime.

Together with 2026393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2026393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013195 + 1013196.

It is an arithmetic number, because the mean of its divisors is an integer number (1013196).

2^2026391 is an apocalyptic number.

2026391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2026391 is an equidigital number, since it uses as much as digits as its factorization.

2026391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2026391 is about 1423.5136107533. The cubic root of 2026391 is about 126.5438614325.

The spelling of 2026391 in words is "two million, twenty-six thousand, three hundred ninety-one".