68275381 has 2 divisors, whose sum is σ = 68275382. Its totient is φ = 68275380.

The previous prime is 68275313. The next prime is 68275387. The reversal of 68275381 is 18357286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51710481 + 16564900 = 7191^2 + 4070^2 .

It is a cyclic number.

It is not a de Polignac number, because 68275381 - 2¹⁵ = 68242613 is a prime.

It is a super-2 number, since 2×68275381² = 9323055301390322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68275387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34137690 + 34137691.

It is an arithmetic number, because the mean of its divisors is an integer number (34137691).

Almost surely, 2^68275381 is an apocalyptic number.

It is an amenable number.

68275381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68275381 is an equidigital number, since it uses as much as digits as its factorization.

68275381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 68275381 is about 8262.8918061415. The cubic root of 68275381 is about 408.7157535050.

The spelling of 68275381 in words is "sixty-eight million, two hundred seventy-five thousand, three hundred eighty-one".