67712321 has 8 divisors (see below), whose sum is σ = 68631360. Its totient is φ = 66799728.

The previous prime is 67712317. The next prime is 67712327. The reversal of 67712321 is 12321776.

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 67712321 - 2² = 67712317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67712327) 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, 21755 + ... + 24671.

It is an arithmetic number, because the mean of its divisors is an integer number (8578920).

Almost surely, 2^67712321 is an apocalyptic number.

It is an amenable number.

67712321 is a deficient number, since it is larger than the sum of its proper divisors (919039).

67712321 is a wasteful number, since it uses less digits than its factorization.

67712321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223.

The product of its digits is 3528, while the sum is 29.

The square root of 67712321 is about 8228.7496620082. The cubic root of 67712321 is about 407.5891051837.

The spelling of 67712321 in words is "sixty-seven million, seven hundred twelve thousand, three hundred twenty-one".