67398621 has 8 divisors (see below), whose sum is σ = 89907360. Its totient is φ = 44911152.

The previous prime is 67398589. The next prime is 67398623. The reversal of 67398621 is 12689376.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67398621 - 2⁵ = 67398589 is a prime.

It is a super-2 number, since 2×67398621² = 9085148225403282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67398623) 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 7 ways as a sum of consecutive naturals, for example, 4866 + ... + 12588.

It is an arithmetic number, because the mean of its divisors is an integer number (11238420).

Almost surely, 2^67398621 is an apocalyptic number.

It is an amenable number.

67398621 is a deficient number, since it is larger than the sum of its proper divisors (22508739).

67398621 is a wasteful number, since it uses less digits than its factorization.

67398621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10635.

The product of its digits is 108864, while the sum is 42.

The square root of 67398621 is about 8209.6663147780. Note that the first 3 decimals coincide. The cubic root of 67398621 is about 406.9586996549.

The spelling of 67398621 in words is "sixty-seven million, three hundred ninety-eight thousand, six hundred twenty-one".