68836381 has 2 divisors, whose sum is σ = 68836382. Its totient is φ = 68836380.

The previous prime is 68836379. The next prime is 68836387. The reversal of 68836381 is 18363886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58660281 + 10176100 = 7659^2 + 3190^2 .

It is a cyclic number.

It is not a de Polignac number, because 68836381 - 2¹ = 68836379 is a prime.

It is a super-2 number, since 2×68836381² = 9476894698354322, which contains 22 as substring.

Together with 68836379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68836387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34418190 + 34418191.

It is an arithmetic number, because the mean of its divisors is an integer number (34418191).

Almost surely, 2^68836381 is an apocalyptic number.

It is an amenable number.

68836381 is a deficient number, since it is larger than the sum of its proper divisors (1).

68836381 is an equidigital number, since it uses as much as digits as its factorization.

68836381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 43.

The square root of 68836381 is about 8296.7693110029. The cubic root of 68836381 is about 409.8321363187.

The spelling of 68836381 in words is "sixty-eight million, eight hundred thirty-six thousand, three hundred eighty-one".