168722069 has 2 divisors, whose sum is σ = 168722070. Its totient is φ = 168722068.

The previous prime is 168722041. The next prime is 168722111. The reversal of 168722069 is 960227861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129095044 + 39627025 = 11362^2 + 6295^2 .

It is a cyclic number.

It is not a de Polignac number, because 168722069 - 2¹² = 168717973 is a prime.

It is a super-2 number, since 2×168722069² = 56934273135281522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168722009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84361034 + 84361035.

It is an arithmetic number, because the mean of its divisors is an integer number (84361035).

Almost surely, 2^168722069 is an apocalyptic number.

It is an amenable number.

168722069 is a deficient number, since it is larger than the sum of its proper divisors (1).

168722069 is an equidigital number, since it uses as much as digits as its factorization.

168722069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 168722069 is about 12989.3059475863. The cubic root of 168722069 is about 552.5742346149.

The spelling of 168722069 in words is "one hundred sixty-eight million, seven hundred twenty-two thousand, sixty-nine".