68730979 has 4 divisors (see below), whose sum is σ = 68780376. Its totient is φ = 68681584.

The previous prime is 68730971. The next prime is 68731001. The reversal of 68730979 is 97903786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97903786 = 2 ⋅48951893.

It is a cyclic number.

It is not a de Polignac number, because 68730979 - 2³ = 68730971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68730971) 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, 22549 + ... + 25414.

It is an arithmetic number, because the mean of its divisors is an integer number (17195094).

Almost surely, 2^68730979 is an apocalyptic number.

68730979 is a deficient number, since it is larger than the sum of its proper divisors (49397).

68730979 is a wasteful number, since it uses less digits than its factorization.

68730979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49396.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 68730979 is about 8290.4148870850. The cubic root of 68730979 is about 409.6228516704.

The spelling of 68730979 in words is "sixty-eight million, seven hundred thirty thousand, nine hundred seventy-nine".