67939321 has 8 divisors (see below), whose sum is σ = 70277888. Its totient is φ = 65610000.

The previous prime is 67939303. The next prime is 67939331. The reversal of 67939321 is 12393976.

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

It is a 8-Lehmer number, since φ(67939321) divides (67939321-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 67939321 - 2⁹ = 67938809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67939301) 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, 14746 + ... + 18796.

It is an arithmetic number, because the mean of its divisors is an integer number (8784736).

Almost surely, 2^67939321 is an apocalyptic number.

It is an amenable number.

67939321 is a deficient number, since it is larger than the sum of its proper divisors (2338567).

67939321 is a wasteful number, since it uses less digits than its factorization.

67939321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623.

The product of its digits is 61236, while the sum is 40.

The square root of 67939321 is about 8242.5312252972. The cubic root of 67939321 is about 408.0440668314.

It can be divided in two parts, 679 and 39321, that added together give a square (40000 = 200²).

The spelling of 67939321 in words is "sixty-seven million, nine hundred thirty-nine thousand, three hundred twenty-one".