67886381 has 2 divisors, whose sum is σ = 67886382. Its totient is φ = 67886380.

The previous prime is 67886353. The next prime is 67886407. The reversal of 67886381 is 18368876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55741156 + 12145225 = 7466^2 + 3485^2 .

It is a cyclic number.

It is not a de Polignac number, because 67886381 - 2¹⁰ = 67885357 is a prime.

It is a super-2 number, since 2×67886381² = 9217121450554322, 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 (67886081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33943190 + 33943191.

It is an arithmetic number, because the mean of its divisors is an integer number (33943191).

Almost surely, 2^67886381 is an apocalyptic number.

It is an amenable number.

67886381 is a deficient number, since it is larger than the sum of its proper divisors (1).

67886381 is an equidigital number, since it uses as much as digits as its factorization.

67886381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 47.

The square root of 67886381 is about 8239.3192073132. The cubic root of 67886381 is about 407.9380532793.

The spelling of 67886381 in words is "sixty-seven million, eight hundred eighty-six thousand, three hundred eighty-one".