30979867 has 2 divisors, whose sum is σ = 30979868. Its totient is φ = 30979866.

The previous prime is 30979843. The next prime is 30979877. The reversal of 30979867 is 76897903.

It is a strong prime.

It is an emirp because it is prime and its reverse (76897903) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30979867 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30979867.

It is not a weakly prime, because it can be changed into another prime (30979877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15489933 + 15489934.

It is an arithmetic number, because the mean of its divisors is an integer number (15489934).

Almost surely, 2^30979867 is an apocalyptic number.

30979867 is a deficient number, since it is larger than the sum of its proper divisors (1).

30979867 is an equidigital number, since it uses as much as digits as its factorization.

30979867 is an odious number, because the sum of its binary digits is odd.

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

The square root of 30979867 is about 5565.9560724102. The cubic root of 30979867 is about 314.0700446873.

The spelling of 30979867 in words is "thirty million, nine hundred seventy-nine thousand, eight hundred sixty-seven".