30768979 has 4 divisors (see below), whose sum is σ = 30783600. Its totient is φ = 30754360.

The previous prime is 30768937. The next prime is 30769001. The reversal of 30768979 is 97986703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97986703 = 181 ⋅541363.

It is a cyclic number.

It is not a de Polignac number, because 30768979 - 2¹⁷ = 30637907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30768379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3487 + ... + 8584.

It is an arithmetic number, because the mean of its divisors is an integer number (7695900).

Almost surely, 2^30768979 is an apocalyptic number.

30768979 is a deficient number, since it is larger than the sum of its proper divisors (14621).

30768979 is a wasteful number, since it uses less digits than its factorization.

30768979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14620.

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

The square root of 30768979 is about 5546.9792680341. The cubic root of 30768979 is about 313.3557693557.

The spelling of 30768979 in words is "thirty million, seven hundred sixty-eight thousand, nine hundred seventy-nine".