820449067 has 2 divisors, whose sum is σ = 820449068. Its totient is φ = 820449066.

The previous prime is 820449041. The next prime is 820449101. The reversal of 820449067 is 760944028.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820449067 is a prime.

It is not a weakly prime, because it can be changed into another prime (820449037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410224533 + 410224534.

It is an arithmetic number, because the mean of its divisors is an integer number (410224534).

Almost surely, 2^820449067 is an apocalyptic number.

820449067 is a deficient number, since it is larger than the sum of its proper divisors (1).

820449067 is an equidigital number, since it uses as much as digits as its factorization.

820449067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 820449067 is about 28643.4821032639. The cubic root of 820449067 is about 936.1609938543.

The spelling of 820449067 in words is "eight hundred twenty million, four hundred forty-nine thousand, sixty-seven".