129476231 has 8 divisors (see below), whose sum is σ = 131502144. Its totient is φ = 127457280.

The previous prime is 129476201. The next prime is 129476251. The reversal of 129476231 is 132674921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129476231 - 2¹⁸ = 129214087 is a prime.

It is a super-2 number, since 2×129476231² = 33528188787930722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129476191 and 129476200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129476201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45410 + ... + 48176.

It is an arithmetic number, because the mean of its divisors is an integer number (16437768).

Almost surely, 2^129476231 is an apocalyptic number.

129476231 is a deficient number, since it is larger than the sum of its proper divisors (2025913).

129476231 is an equidigital number, since it uses as much as digits as its factorization.

129476231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481.

The product of its digits is 18144, while the sum is 35.

The square root of 129476231 is about 11378.7622789124. The cubic root of 129476231 is about 505.8984509302.

The spelling of 129476231 in words is "one hundred twenty-nine million, four hundred seventy-six thousand, two hundred thirty-one".