129630481 has 4 divisors (see below), whose sum is σ = 129654000. Its totient is φ = 129606964.

The previous prime is 129630439. The next prime is 129630503. The reversal of 129630481 is 184036921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184036921 = 367 ⋅501463.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129630481 is a prime.

It is a super-2 number, since 2×129630481² = 33608123208582722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129630181) 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 in 3 ways as a sum of consecutive naturals, for example, 1470 + ... + 16168.

It is an arithmetic number, because the mean of its divisors is an integer number (32413500).

Almost surely, 2^129630481 is an apocalyptic number.

It is an amenable number.

129630481 is a deficient number, since it is larger than the sum of its proper divisors (23519).

129630481 is an equidigital number, since it uses as much as digits as its factorization.

129630481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23518.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 129630481 is about 11385.5382393631. The cubic root of 129630481 is about 506.0992699462.

The spelling of 129630481 in words is "one hundred twenty-nine million, six hundred thirty thousand, four hundred eighty-one".