821461799 has 2 divisors, whose sum is σ = 821461800. Its totient is φ = 821461798.

The previous prime is 821461769. The next prime is 821461819. The reversal of 821461799 is 997164128.

821461799 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 821461799 - 2²⁴ = 804684583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821461769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410730899 + 410730900.

It is an arithmetic number, because the mean of its divisors is an integer number (410730900).

Almost surely, 2^821461799 is an apocalyptic number.

821461799 is a deficient number, since it is larger than the sum of its proper divisors (1).

821461799 is an equidigital number, since it uses as much as digits as its factorization.

821461799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 821461799 is about 28661.1548790344. The cubic root of 821461799 is about 936.5460229842.

The spelling of 821461799 in words is "eight hundred twenty-one million, four hundred sixty-one thousand, seven hundred ninety-nine".