168378053 has 2 divisors, whose sum is σ = 168378054. Its totient is φ = 168378052.

The previous prime is 168378029. The next prime is 168378073. The reversal of 168378053 is 350873861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152201569 + 16176484 = 12337^2 + 4022^2 .

It is a cyclic number.

It is not a de Polignac number, because 168378053 - 2¹² = 168373957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168378053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168378073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84189026 + 84189027.

It is an arithmetic number, because the mean of its divisors is an integer number (84189027).

Almost surely, 2^168378053 is an apocalyptic number.

It is an amenable number.

168378053 is a deficient number, since it is larger than the sum of its proper divisors (1).

168378053 is an equidigital number, since it uses as much as digits as its factorization.

168378053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 168378053 is about 12976.0569126372. The cubic root of 168378053 is about 552.1984218492.

The spelling of 168378053 in words is "one hundred sixty-eight million, three hundred seventy-eight thousand, fifty-three".