663130429 has 4 divisors (see below), whose sum is σ = 714140476. Its totient is φ = 612120384.

The previous prime is 663130427. The next prime is 663130463. The reversal of 663130429 is 924031366.

It is a happy number.

663130429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 924031366 = 2 ⋅462015683.

It can be written as a sum of positive squares in 2 ways, for example, as 209525625 + 453604804 = 14475^2 + 21298^2 .

It is a cyclic number.

It is not a de Polignac number, because 663130429 - 2¹ = 663130427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663130394 and 663130403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663130427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25505004 + ... + 25505029.

It is an arithmetic number, because the mean of its divisors is an integer number (178535119).

Almost surely, 2^663130429 is an apocalyptic number.

It is an amenable number.

663130429 is a deficient number, since it is larger than the sum of its proper divisors (51010047).

663130429 is a wasteful number, since it uses less digits than its factorization.

663130429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51010046.

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

The square root of 663130429 is about 25751.3189759282. The cubic root of 663130429 is about 872.0331315618.

The spelling of 663130429 in words is "six hundred sixty-three million, one hundred thirty thousand, four hundred twenty-nine".