30139229 has 2 divisors, whose sum is σ = 30139230. Its totient is φ = 30139228.

The previous prime is 30139199. The next prime is 30139237. The reversal of 30139229 is 92293103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19096900 + 11042329 = 4370^2 + 3323^2 .

It is a cyclic number.

It is not a de Polignac number, because 30139229 - 2⁸ = 30138973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30139279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15069614 + 15069615.

It is an arithmetic number, because the mean of its divisors is an integer number (15069615).

Almost surely, 2^30139229 is an apocalyptic number.

It is an amenable number.

30139229 is a deficient number, since it is larger than the sum of its proper divisors (1).

30139229 is an equidigital number, since it uses as much as digits as its factorization.

30139229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 30139229 is about 5489.9206733795. The cubic root of 30139229 is about 311.2031943079.

The spelling of 30139229 in words is "thirty million, one hundred thirty-nine thousand, two hundred twenty-nine".