168004477 has 2 divisors, whose sum is σ = 168004478. Its totient is φ = 168004476.

The previous prime is 168004471. The next prime is 168004519. The reversal of 168004477 is 774400861.

168004477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167417721 + 586756 = 12939^2 + 766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168004477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168004471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84002238 + 84002239.

It is an arithmetic number, because the mean of its divisors is an integer number (84002239).

Almost surely, 2^168004477 is an apocalyptic number.

It is an amenable number.

168004477 is a deficient number, since it is larger than the sum of its proper divisors (1).

168004477 is an equidigital number, since it uses as much as digits as its factorization.

168004477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 168004477 is about 12961.6540996896. The cubic root of 168004477 is about 551.7897367023.

The spelling of 168004477 in words is "one hundred sixty-eight million, four thousand, four hundred seventy-seven".