821001463 has 2 divisors, whose sum is σ = 821001464. Its totient is φ = 821001462.

The previous prime is 821001443. The next prime is 821001469. The reversal of 821001463 is 364100128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 821001463 - 2⁵ = 821001431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (821001469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410500731 + 410500732.

It is an arithmetic number, because the mean of its divisors is an integer number (410500732).

Almost surely, 2^821001463 is an apocalyptic number.

821001463 is a deficient number, since it is larger than the sum of its proper divisors (1).

821001463 is an equidigital number, since it uses as much as digits as its factorization.

821001463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 821001463 is about 28653.1230933035. The cubic root of 821001463 is about 936.3710477518.

The spelling of 821001463 in words is "eight hundred twenty-one million, one thousand, four hundred sixty-three".