129938 has 4 divisors (see below), whose sum is σ = 194910. Its totient is φ = 64968.

The previous prime is 129937. The next prime is 129953. The reversal of 129938 is 839921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 124609 + 5329 = 353^2 + 73^2 .

It is not an unprimeable number, because it can be changed into a prime (129937) 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 as a sum of consecutive naturals, namely, 32483 + ... + 32486.

2¹²⁹⁹³⁸ is an apocalyptic number.

129938 is a deficient number, since it is larger than the sum of its proper divisors (64972).

129938 is an equidigital number, since it uses as much as digits as its factorization.

129938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64971.

The product of its digits is 3888, while the sum is 32.

The square root of 129938 is about 360.4691387623. The cubic root of 129938 is about 50.6499155921.

The spelling of 129938 in words is "one hundred twenty-nine thousand, nine hundred thirty-eight".