821197463 has 2 divisors, whose sum is σ = 821197464. Its totient is φ = 821197462.

The previous prime is 821197439. The next prime is 821197469. The reversal of 821197463 is 364791128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 821197463 - 2¹⁴ = 821181079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 821197463.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821197469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410598731 + 410598732.

It is an arithmetic number, because the mean of its divisors is an integer number (410598732).

Almost surely, 2^821197463 is an apocalyptic number.

821197463 is a deficient number, since it is larger than the sum of its proper divisors (1).

821197463 is an equidigital number, since it uses as much as digits as its factorization.

821197463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 821197463 is about 28656.5431097332. The cubic root of 821197463 is about 936.4455559920.

The spelling of 821197463 in words is "eight hundred twenty-one million, one hundred ninety-seven thousand, four hundred sixty-three".