67721223 has 8 divisors (see below), whose sum is σ = 94220928. Its totient is φ = 43184504.

The previous prime is 67721197. The next prime is 67721231. The reversal of 67721223 is 32212776.

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 67721223 - 2⁹ = 67720711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67721233) 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, 490665 + ... + 490802.

It is an arithmetic number, because the mean of its divisors is an integer number (11777616).

Almost surely, 2^67721223 is an apocalyptic number.

67721223 is a deficient number, since it is larger than the sum of its proper divisors (26499705).

67721223 is a wasteful number, since it uses less digits than its factorization.

67721223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981493.

The product of its digits is 7056, while the sum is 30.

The square root of 67721223 is about 8229.2905526540. The cubic root of 67721223 is about 407.6069660356.

Adding to 67721223 its reverse (32212776), we get a palindrome (99933999).

The spelling of 67721223 in words is "sixty-seven million, seven hundred twenty-one thousand, two hundred twenty-three".