30347381 has 2 divisors, whose sum is σ = 30347382. Its totient is φ = 30347380.

The previous prime is 30347377. The next prime is 30347399. The reversal of 30347381 is 18374303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29528356 + 819025 = 5434^2 + 905^2 .

It is a cyclic number.

It is not a de Polignac number, because 30347381 - 2² = 30347377 is a prime.

It is a super-2 number, since 2×30347381² = 1841927067118322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30347081) 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, 15173690 + 15173691.

It is an arithmetic number, because the mean of its divisors is an integer number (15173691).

Almost surely, 2^30347381 is an apocalyptic number.

It is an amenable number.

30347381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30347381 is an equidigital number, since it uses as much as digits as its factorization.

30347381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 30347381 is about 5508.8457048641. The cubic root of 30347381 is about 311.9179771511.

The spelling of 30347381 in words is "thirty million, three hundred forty-seven thousand, three hundred eighty-one".