168072077 has 2 divisors, whose sum is σ = 168072078. Its totient is φ = 168072076.

The previous prime is 168072059. The next prime is 168072101. The reversal of 168072077 is 770270861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88755241 + 79316836 = 9421^2 + 8906^2 .

It is a cyclic number.

It is not a de Polignac number, because 168072077 - 2¹⁰ = 168071053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168072077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168072977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84036038 + 84036039.

It is an arithmetic number, because the mean of its divisors is an integer number (84036039).

Almost surely, 2^168072077 is an apocalyptic number.

It is an amenable number.

168072077 is a deficient number, since it is larger than the sum of its proper divisors (1).

168072077 is an equidigital number, since it uses as much as digits as its factorization.

168072077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 168072077 is about 12964.2615292966. The cubic root of 168072077 is about 551.8637346994.

The spelling of 168072077 in words is "one hundred sixty-eight million, seventy-two thousand, seventy-seven".