67941621 has 36 divisors (see below), whose sum is σ = 109238220. Its totient is φ = 40656000.

The previous prime is 67941619. The next prime is 67941631. The reversal of 67941621 is 12614976.

It can be written as a sum of positive squares in 2 ways, for example, as 36469521 + 31472100 = 6039^2 + 5610^2 .

It is not a de Polignac number, because 67941621 - 2¹ = 67941619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67941631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 96571 + ... + 97271.

It is an arithmetic number, because the mean of its divisors is an integer number (3034395).

Almost surely, 2^67941621 is an apocalyptic number.

It is an amenable number.

67941621 is a deficient number, since it is larger than the sum of its proper divisors (41296599).

67941621 is a wasteful number, since it uses less digits than its factorization.

67941621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 804 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 67941621 is about 8242.6707443644. The cubic root of 67941621 is about 408.0486713851.

The spelling of 67941621 in words is "sixty-seven million, nine hundred forty-one thousand, six hundred twenty-one".