68401181 has 2 divisors, whose sum is σ = 68401182. Its totient is φ = 68401180.

The previous prime is 68401147. The next prime is 68401189. The reversal of 68401181 is 18110486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68392900 + 8281 = 8270^2 + 91^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68401181 is a prime.

It is a super-2 number, since 2×68401181² = 9357443124389522, 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 (68401189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34200590 + 34200591.

It is an arithmetic number, because the mean of its divisors is an integer number (34200591).

Almost surely, 2^68401181 is an apocalyptic number.

It is an amenable number.

68401181 is a deficient number, since it is larger than the sum of its proper divisors (1).

68401181 is an equidigital number, since it uses as much as digits as its factorization.

68401181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 68401181 is about 8270.5006499002. The cubic root of 68401181 is about 408.9666242893.

The spelling of 68401181 in words is "sixty-eight million, four hundred one thousand, one hundred eighty-one".