905491 has 2 divisors, whose sum is σ = 905492. Its totient is φ = 905490.

The previous prime is 905477. The next prime is 905497. The reversal of 905491 is 194509.

905491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 905491 - 2¹¹ = 903443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (905497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452745 + 452746.

It is an arithmetic number, because the mean of its divisors is an integer number (452746).

2⁹⁰⁵⁴⁹¹ is an apocalyptic number.

905491 is a deficient number, since it is larger than the sum of its proper divisors (1).

905491 is an equidigital number, since it uses as much as digits as its factorization.

905491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 905491 is about 951.5729083996. The cubic root of 905491 is about 96.7448924207.

The spelling of 905491 in words is "nine hundred five thousand, four hundred ninety-one".