820911067 has 2 divisors, whose sum is σ = 820911068. Its totient is φ = 820911066.

The previous prime is 820911053. The next prime is 820911083. The reversal of 820911067 is 760119028.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820911067 is a prime.

It is not a weakly prime, because it can be changed into another prime (820911467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410455533 + 410455534.

It is an arithmetic number, because the mean of its divisors is an integer number (410455534).

Almost surely, 2^820911067 is an apocalyptic number.

820911067 is a deficient number, since it is larger than the sum of its proper divisors (1).

820911067 is an equidigital number, since it uses as much as digits as its factorization.

820911067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 820911067 is about 28651.5456302099. The cubic root of 820911067 is about 936.3366802515.

The spelling of 820911067 in words is "eight hundred twenty million, nine hundred eleven thousand, sixty-seven".