30142909 has 2 divisors, whose sum is σ = 30142910. Its totient is φ = 30142908.

The previous prime is 30142907. The next prime is 30142927. The reversal of 30142909 is 90924103.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30140100 + 2809 = 5490^2 + 53^2 .

It is a cyclic number.

It is not a de Polignac number, because 30142909 - 2¹ = 30142907 is a prime.

Together with 30142907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30142907) 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 as a sum of consecutive naturals, namely, 15071454 + 15071455.

It is an arithmetic number, because the mean of its divisors is an integer number (15071455).

Almost surely, 2^30142909 is an apocalyptic number.

It is an amenable number.

30142909 is a deficient number, since it is larger than the sum of its proper divisors (1).

30142909 is an equidigital number, since it uses as much as digits as its factorization.

30142909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 30142909 is about 5490.2558228192. The cubic root of 30142909 is about 311.2158597630.

The spelling of 30142909 in words is "thirty million, one hundred forty-two thousand, nine hundred nine".