129338945 has 8 divisors (see below), whose sum is σ = 155304744. Its totient is φ = 103405824.

The previous prime is 129338933. The next prime is 129338981. The reversal of 129338945 is 549833921.

It can be written as a sum of positive squares in 4 ways, for example, as 2483776 + 126855169 = 1576^2 + 11263^2 .

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 129338945 - 2¹⁴ = 129322561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129338896 and 129338905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1607 + ... + 16163.

It is an arithmetic number, because the mean of its divisors is an integer number (19413093).

Almost surely, 2^129338945 is an apocalyptic number.

It is an amenable number.

129338945 is a deficient number, since it is larger than the sum of its proper divisors (25965799).

129338945 is a wasteful number, since it uses less digits than its factorization.

129338945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16339.

The product of its digits is 233280, while the sum is 44.

The square root of 129338945 is about 11372.7281247729. The cubic root of 129338945 is about 505.7195832569.

The spelling of 129338945 in words is "one hundred twenty-nine million, three hundred thirty-eight thousand, nine hundred forty-five".