68321273 has 4 divisors (see below), whose sum is σ = 68679168. Its totient is φ = 67963380.

The previous prime is 68321263. The next prime is 68321299. The reversal of 68321273 is 37212386.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68321273 - 2¹⁸ = 68059129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68321213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178661 + ... + 179042.

It is an arithmetic number, because the mean of its divisors is an integer number (17169792).

Almost surely, 2^68321273 is an apocalyptic number.

It is an amenable number.

68321273 is a deficient number, since it is larger than the sum of its proper divisors (357895).

68321273 is a wasteful number, since it uses less digits than its factorization.

68321273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357894.

The product of its digits is 12096, while the sum is 32.

The square root of 68321273 is about 8265.6683335348. The cubic root of 68321273 is about 408.8073071618.

The spelling of 68321273 in words is "sixty-eight million, three hundred twenty-one thousand, two hundred seventy-three".