68407321 has 8 divisors (see below), whose sum is σ = 69305600. Its totient is φ = 67515120.

The previous prime is 68407271. The next prime is 68407331. The reversal of 68407321 is 12370486.

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 68407321 - 2⁷ = 68407193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68407331) 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, 23800 + ... + 26518.

It is an arithmetic number, because the mean of its divisors is an integer number (8663200).

Almost surely, 2^68407321 is an apocalyptic number.

It is an amenable number.

68407321 is a deficient number, since it is larger than the sum of its proper divisors (898279).

68407321 is a wasteful number, since it uses less digits than its factorization.

68407321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 68407321 is about 8270.8718403806. The cubic root of 68407321 is about 408.9788608224.

It can be divided in two parts, 6840 and 7321, that added together give a square (14161 = 119²).

The spelling of 68407321 in words is "sixty-eight million, four hundred seven thousand, three hundred twenty-one".