821670467 has 2 divisors, whose sum is σ = 821670468. Its totient is φ = 821670466.

The previous prime is 821670419. The next prime is 821670481. The reversal of 821670467 is 764076128.

821670467 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 a de Polignac number, because none of the positive numbers 2^k-821670467 is a prime.

It is not a weakly prime, because it can be changed into another prime (821676467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410835233 + 410835234.

It is an arithmetic number, because the mean of its divisors is an integer number (410835234).

Almost surely, 2^821670467 is an apocalyptic number.

821670467 is a deficient number, since it is larger than the sum of its proper divisors (1).

821670467 is an equidigital number, since it uses as much as digits as its factorization.

821670467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 821670467 is about 28664.7949059469. The cubic root of 821670467 is about 936.6253168481.

The spelling of 821670467 in words is "eight hundred twenty-one million, six hundred seventy thousand, four hundred sixty-seven".