740891 has 2 divisors, whose sum is σ = 740892. Its totient is φ = 740890.

The previous prime is 740849. The next prime is 740893. The reversal of 740891 is 198047.

It is a strong prime.

It is an emirp because it is prime and its reverse (198047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 740891 - 2¹⁸ = 478747 is a prime.

It is a Sophie Germain prime.

Together with 740893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (740893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370445 + 370446.

It is an arithmetic number, because the mean of its divisors is an integer number (370446).

2⁷⁴⁰⁸⁹¹ is an apocalyptic number.

740891 is a deficient number, since it is larger than the sum of its proper divisors (1).

740891 is an equidigital number, since it uses as much as digits as its factorization.

740891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 740891 is about 860.7502541388. The cubic root of 740891 is about 90.4867048019.

The spelling of 740891 in words is "seven hundred forty thousand, eight hundred ninety-one".