3891343 has 2 divisors, whose sum is σ = 3891344. Its totient is φ = 3891342.

The previous prime is 3891331. The next prime is 3891353. The reversal of 3891343 is 3431983.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3891343 is a prime.

3891343 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3891323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945671 + 1945672.

It is an arithmetic number, because the mean of its divisors is an integer number (1945672).

Almost surely, 2^3891343 is an apocalyptic number.

3891343 is a deficient number, since it is larger than the sum of its proper divisors (1).

3891343 is an equidigital number, since it uses as much as digits as its factorization.

3891343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 3891343 is about 1972.6487269659. The cubic root of 3891343 is about 157.2895383267.

The spelling of 3891343 in words is "three million, eight hundred ninety-one thousand, three hundred forty-three".