841691 has 2 divisors, whose sum is σ = 841692. Its totient is φ = 841690.

The previous prime is 841663. The next prime is 841697. The reversal of 841691 is 196148.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-841691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (841697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420845 + 420846.

It is an arithmetic number, because the mean of its divisors is an integer number (420846).

2⁸⁴¹⁶⁹¹ is an apocalyptic number.

841691 is a deficient number, since it is larger than the sum of its proper divisors (1).

841691 is an equidigital number, since it uses as much as digits as its factorization.

841691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 841691 is about 917.4371913107. The cubic root of 841691 is about 94.4171516164.

The spelling of 841691 in words is "eight hundred forty-one thousand, six hundred ninety-one".