67414381 has 2 divisors, whose sum is σ = 67414382. Its totient is φ = 67414380.

The previous prime is 67414379. The next prime is 67414409. The reversal of 67414381 is 18341476.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37711881 + 29702500 = 6141^2 + 5450^2 .

It is a cyclic number.

It is not a de Polignac number, because 67414381 - 2¹ = 67414379 is a prime.

It is a super-2 number, since 2×67414381² = 9089397531226322, which contains 22 as substring.

Together with 67414379, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67414351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33707190 + 33707191.

It is an arithmetic number, because the mean of its divisors is an integer number (33707191).

Almost surely, 2^67414381 is an apocalyptic number.

It is an amenable number.

67414381 is a deficient number, since it is larger than the sum of its proper divisors (1).

67414381 is an equidigital number, since it uses as much as digits as its factorization.

67414381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 34.

The square root of 67414381 is about 8210.6261028012. The cubic root of 67414381 is about 406.9904172636.

The spelling of 67414381 in words is "sixty-seven million, four hundred fourteen thousand, three hundred eighty-one".