30438137 has 2 divisors, whose sum is σ = 30438138. Its totient is φ = 30438136.

The previous prime is 30438119. The next prime is 30438169. The reversal of 30438137 is 73183403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30426256 + 11881 = 5516^2 + 109^2 .

It is an emirp because it is prime and its reverse (73183403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30438137 - 2⁶ = 30438073 is a prime.

It is not a weakly prime, because it can be changed into another prime (30438337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15219068 + 15219069.

It is an arithmetic number, because the mean of its divisors is an integer number (15219069).

Almost surely, 2^30438137 is an apocalyptic number.

It is an amenable number.

30438137 is a deficient number, since it is larger than the sum of its proper divisors (1).

30438137 is an equidigital number, since it uses as much as digits as its factorization.

30438137 is an evil number, because the sum of its binary digits is even.

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

The square root of 30438137 is about 5517.0768528270. The cubic root of 30438137 is about 312.2286053320.

The spelling of 30438137 in words is "thirty million, four hundred thirty-eight thousand, one hundred thirty-seven".