30121079 has 2 divisors, whose sum is σ = 30121080. Its totient is φ = 30121078.

The previous prime is 30121073. The next prime is 30121081. The reversal of 30121079 is 97012103.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30121079 is a prime.

Together with 30121081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060539 + 15060540.

It is an arithmetic number, because the mean of its divisors is an integer number (15060540).

Almost surely, 2^30121079 is an apocalyptic number.

30121079 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121079 is an equidigital number, since it uses as much as digits as its factorization.

30121079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 30121079 is about 5488.2673950893. The cubic root of 30121079 is about 311.1407123715.

The spelling of 30121079 in words is "thirty million, one hundred twenty-one thousand, seventy-nine".