68177381 has 2 divisors, whose sum is σ = 68177382. Its totient is φ = 68177380.

The previous prime is 68177363. The next prime is 68177393. The reversal of 68177381 is 18377186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41809156 + 26368225 = 6466^2 + 5135^2 .

It is a cyclic number.

It is not a de Polignac number, because 68177381 - 2¹⁰ = 68176357 is a prime.

It is a super-2 number, since 2×68177381² = 9296310560038322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68177311) 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, 34088690 + 34088691.

It is an arithmetic number, because the mean of its divisors is an integer number (34088691).

Almost surely, 2^68177381 is an apocalyptic number.

It is an amenable number.

68177381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68177381 is an equidigital number, since it uses as much as digits as its factorization.

68177381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 41.

The square root of 68177381 is about 8256.9595493741. The cubic root of 68177381 is about 408.5201079558.

The spelling of 68177381 in words is "sixty-eight million, one hundred seventy-seven thousand, three hundred eighty-one".