30979129 has 2 divisors, whose sum is σ = 30979130. Its totient is φ = 30979128.

The previous prime is 30979121. The next prime is 30979133. The reversal of 30979129 is 92197903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30858025 + 121104 = 5555^2 + 348^2 .

It is a cyclic number.

It is not a de Polignac number, because 30979129 - 2³ = 30979121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30979091 and 30979100.

It is not a weakly prime, because it can be changed into another prime (30979121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15489564 + 15489565.

It is an arithmetic number, because the mean of its divisors is an integer number (15489565).

Almost surely, 2^30979129 is an apocalyptic number.

It is an amenable number.

30979129 is a deficient number, since it is larger than the sum of its proper divisors (1).

30979129 is an equidigital number, since it uses as much as digits as its factorization.

30979129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 30979129 is about 5565.8897761274. The cubic root of 30979129 is about 314.0675507500.

The spelling of 30979129 in words is "thirty million, nine hundred seventy-nine thousand, one hundred twenty-nine".