67381623 has 6 divisors (see below), whose sum is σ = 97329024. Its totient is φ = 44921076.

The previous prime is 67381621. The next prime is 67381663. The reversal of 67381623 is 32618376.

It is a happy number.

It is not a de Polignac number, because 67381623 - 2¹ = 67381621 is a prime.

It is a super-2 number, since 2×67381623² = 9080566236228258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67381621) 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 in 5 ways as a sum of consecutive naturals, for example, 3743415 + ... + 3743432.

It is an arithmetic number, because the mean of its divisors is an integer number (16221504).

Almost surely, 2^67381623 is an apocalyptic number.

67381623 is a deficient number, since it is larger than the sum of its proper divisors (29947401).

67381623 is a wasteful number, since it uses less digits than its factorization.

67381623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7486853 (or 7486850 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 67381623 is about 8208.6310064468. The cubic root of 67381623 is about 406.9244849806.

Adding to 67381623 its reverse (32618376), we get a palindrome (99999999).

The spelling of 67381623 in words is "sixty-seven million, three hundred eighty-one thousand, six hundred twenty-three".