820622169 has 12 divisors (see below), whose sum is σ = 1186267056. Its totient is φ = 546655032.

The previous prime is 820622167. The next prime is 820622171. The reversal of 820622169 is 961226028.

It is a happy number.

820622169 is a `hidden beast` number, since 8 + 20 + 622 + 1 + 6 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (820622167) and next prime (820622171).

It is not a de Polignac number, because 820622169 - 2¹ = 820622167 is a prime.

It is a super-2 number, since 2×820622169² = 1346841488508529122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (820622167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23119 + ... + 46644.

It is an arithmetic number, because the mean of its divisors is an integer number (98855588).

Almost surely, 2^820622169 is an apocalyptic number.

It is an amenable number.

820622169 is a deficient number, since it is larger than the sum of its proper divisors (365644887).

820622169 is a wasteful number, since it uses less digits than its factorization.

820622169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71076 (or 71073 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 820622169 is about 28646.5036086431. The cubic root of 820622169 is about 936.2268276971.

The spelling of 820622169 in words is "eight hundred twenty million, six hundred twenty-two thousand, one hundred sixty-nine".