129879038 has 4 divisors (see below), whose sum is σ = 194818560. Its totient is φ = 64939518.

The previous prime is 129879011. The next prime is 129879047. The reversal of 129879038 is 830978921.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129878983 and 129879001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32469758 + ... + 32469761.

It is an arithmetic number, because the mean of its divisors is an integer number (48704640).

Almost surely, 2^129879038 is an apocalyptic number.

129879038 is a deficient number, since it is larger than the sum of its proper divisors (64939522).

129879038 is an equidigital number, since it uses as much as digits as its factorization.

129879038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64939521.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 129879038 is about 11396.4484818736. The cubic root of 129879038 is about 506.4225329119.

The spelling of 129879038 in words is "one hundred twenty-nine million, eight hundred seventy-nine thousand, thirty-eight".