827784491 has 2 divisors, whose sum is σ = 827784492. Its totient is φ = 827784490.

The previous prime is 827784469. The next prime is 827784499. The reversal of 827784491 is 194487728.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 827784491 - 2⁶ = 827784427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (827784499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413892245 + 413892246.

It is an arithmetic number, because the mean of its divisors is an integer number (413892246).

Almost surely, 2^827784491 is an apocalyptic number.

827784491 is a deficient number, since it is larger than the sum of its proper divisors (1).

827784491 is an equidigital number, since it uses as much as digits as its factorization.

827784491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 50.

The square root of 827784491 is about 28771.2441684401. The cubic root of 827784491 is about 938.9427115663.

The spelling of 827784491 in words is "eight hundred twenty-seven million, seven hundred eighty-four thousand, four hundred ninety-one".