68180549 has 2 divisors, whose sum is σ = 68180550. Its totient is φ = 68180548.

The previous prime is 68180543. The next prime is 68180551. The reversal of 68180549 is 94508186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68178049 + 2500 = 8257^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 68180549 - 2²⁴ = 51403333 is a prime.

Together with 68180551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68180543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34090274 + 34090275.

It is an arithmetic number, because the mean of its divisors is an integer number (34090275).

Almost surely, 2^68180549 is an apocalyptic number.

It is an amenable number.

68180549 is a deficient number, since it is larger than the sum of its proper divisors (1).

68180549 is an equidigital number, since it uses as much as digits as its factorization.

68180549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 68180549 is about 8257.1513853144. The cubic root of 68180549 is about 408.5264354290.

The spelling of 68180549 in words is "sixty-eight million, one hundred eighty thousand, five hundred forty-nine".