30439429 has 2 divisors, whose sum is σ = 30439430. Its totient is φ = 30439428.

The previous prime is 30439397. The next prime is 30439441. The reversal of 30439429 is 92493403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29484900 + 954529 = 5430^2 + 977^2 .

It is an emirp because it is prime and its reverse (92493403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30439429 - 2⁵ = 30439397 is a prime.

It is equal to p_1883437 and since 30439429 and 1883437 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 30439394 and 30439403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30439529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15219714 + 15219715.

It is an arithmetic number, because the mean of its divisors is an integer number (15219715).

Almost surely, 2^30439429 is an apocalyptic number.

It is an amenable number.

30439429 is a deficient number, since it is larger than the sum of its proper divisors (1).

30439429 is an equidigital number, since it uses as much as digits as its factorization.

30439429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 30439429 is about 5517.1939425762. The cubic root of 30439429 is about 312.2330229661.

The spelling of 30439429 in words is "thirty million, four hundred thirty-nine thousand, four hundred twenty-nine".