30478429 has 2 divisors, whose sum is σ = 30478430. Its totient is φ = 30478428.

The previous prime is 30478387. The next prime is 30478493. The reversal of 30478429 is 92487403.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28783225 + 1695204 = 5365^2 + 1302^2 .

It is a cyclic number.

It is not a de Polignac number, because 30478429 - 2⁹ = 30477917 is a prime.

It is a Chen prime.

It is equal to p_1885681 and since 30478429 and 1885681 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30478499) 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, 15239214 + 15239215.

It is an arithmetic number, because the mean of its divisors is an integer number (15239215).

Almost surely, 2^30478429 is an apocalyptic number.

It is an amenable number.

30478429 is a deficient number, since it is larger than the sum of its proper divisors (1).

30478429 is an equidigital number, since it uses as much as digits as its factorization.

30478429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 30478429 is about 5520.7272165902. The cubic root of 30478429 is about 312.3663138044.

It can be divided in two parts, 3047 and 8429, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 30478429 in words is "thirty million, four hundred seventy-eight thousand, four hundred twenty-nine".