67384381 has 2 divisors, whose sum is σ = 67384382. Its totient is φ = 67384380.

The previous prime is 67384357. The next prime is 67384423. The reversal of 67384381 is 18348376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64545156 + 2839225 = 8034^2 + 1685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67384381 is a prime.

It is a super-2 number, since 2×67384381² = 9081309605506322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67384301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33692190 + 33692191.

It is an arithmetic number, because the mean of its divisors is an integer number (33692191).

Almost surely, 2^67384381 is an apocalyptic number.

It is an amenable number.

67384381 is a deficient number, since it is larger than the sum of its proper divisors (1).

67384381 is an equidigital number, since it uses as much as digits as its factorization.

67384381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 67384381 is about 8208.7989986355. The cubic root of 67384381 is about 406.9300368525.

The spelling of 67384381 in words is "sixty-seven million, three hundred eighty-four thousand, three hundred eighty-one".