68070181 has 4 divisors (see below), whose sum is σ = 68323500. Its totient is φ = 67816864.

The previous prime is 68070169. The next prime is 68070187. The reversal of 68070181 is 18107086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18107086 = 2 ⋅9053543.

It can be written as a sum of positive squares in 2 ways, for example, as 29257281 + 38812900 = 5409^2 + 6230^2 .

It is a cyclic number.

It is not a de Polignac number, because 68070181 - 2⁹ = 68069669 is a prime.

It is a super-2 number, since 2×68070181² = 9267099082745522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68070187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126256 + ... + 126793.

It is an arithmetic number, because the mean of its divisors is an integer number (17080875).

Almost surely, 2^68070181 is an apocalyptic number.

It is an amenable number.

68070181 is a deficient number, since it is larger than the sum of its proper divisors (253319).

68070181 is a wasteful number, since it uses less digits than its factorization.

68070181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253318.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 68070181 is about 8250.4655020187. The cubic root of 68070181 is about 408.3058808514.

The spelling of 68070181 in words is "sixty-eight million, seventy thousand, one hundred eighty-one".