30278113 has 2 divisors, whose sum is σ = 30278114. Its totient is φ = 30278112.

The previous prime is 30278107. The next prime is 30278119. The reversal of 30278113 is 31187203.

It is a balanced prime because it is at equal distance from previous prime (30278107) and next prime (30278119).

It can be written as a sum of positive squares in only one way, i.e., 20493729 + 9784384 = 4527^2 + 3128^2 .

It is an emirp because it is prime and its reverse (31187203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30278113 - 2⁵ = 30278081 is a prime.

It is not a weakly prime, because it can be changed into another prime (30278119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15139056 + 15139057.

It is an arithmetic number, because the mean of its divisors is an integer number (15139057).

Almost surely, 2^30278113 is an apocalyptic number.

It is an amenable number.

30278113 is a deficient number, since it is larger than the sum of its proper divisors (1).

30278113 is an equidigital number, since it uses as much as digits as its factorization.

30278113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 30278113 is about 5502.5551337538. Note that the first 3 decimals coincide. The cubic root of 30278113 is about 311.6804784154.

The spelling of 30278113 in words is "thirty million, two hundred seventy-eight thousand, one hundred thirteen".