129281683 has 8 divisors (see below), whose sum is σ = 131156480. Its totient is φ = 127413000.

The previous prime is 129281639. The next prime is 129281701. The reversal of 129281683 is 386182921.

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 129281683 - 2¹⁷ = 129150611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129281483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56308 + ... + 58558.

It is an arithmetic number, because the mean of its divisors is an integer number (16394560).

Almost surely, 2^129281683 is an apocalyptic number.

129281683 is a deficient number, since it is larger than the sum of its proper divisors (1874797).

129281683 is an equidigital number, since it uses as much as digits as its factorization.

129281683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057.

The product of its digits is 41472, while the sum is 40.

The square root of 129281683 is about 11370.2103322674. The cubic root of 129281683 is about 505.6449401312.

The spelling of 129281683 in words is "one hundred twenty-nine million, two hundred eighty-one thousand, six hundred eighty-three".