743891 has 2 divisors, whose sum is σ = 743892. Its totient is φ = 743890.

The previous prime is 743881. The next prime is 743917. The reversal of 743891 is 198347.

It is a weak prime.

It is an emirp because it is prime and its reverse (198347) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-743891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (743851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371945 + 371946.

It is an arithmetic number, because the mean of its divisors is an integer number (371946).

2⁷⁴³⁸⁹¹ is an apocalyptic number.

743891 is a deficient number, since it is larger than the sum of its proper divisors (1).

743891 is an equidigital number, since it uses as much as digits as its factorization.

743891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 743891 is about 862.4911593750. The cubic root of 743891 is about 90.6086726035.

The spelling of 743891 in words is "seven hundred forty-three thousand, eight hundred ninety-one".