68017621 has 8 divisors (see below), whose sum is σ = 77785344. Its totient is φ = 58262640.

The previous prime is 68017591. The next prime is 68017633. The reversal of 68017621 is 12671086.

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

It is a cyclic number.

It is not a de Polignac number, because 68017621 - 2⁵ = 68017589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68017681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15891 + ... + 19711.

It is an arithmetic number, because the mean of its divisors is an integer number (9723168).

Almost surely, 2^68017621 is an apocalyptic number.

It is an amenable number.

68017621 is a deficient number, since it is larger than the sum of its proper divisors (9767723).

68017621 is a wasteful number, since it uses less digits than its factorization.

68017621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 68017621 is about 8247.2796120903. The cubic root of 68017621 is about 408.2007634432.

The spelling of 68017621 in words is "sixty-eight million, seventeen thousand, six hundred twenty-one".