129879073 has 6 divisors (see below), whose sum is σ = 130689506. Its totient is φ = 129073632.

The previous prime is 129879067. The next prime is 129879077. The reversal of 129879073 is 370978921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 87459904 + 42419169 = 9352^2 + 6513^2 .

It is not a de Polignac number, because 129879073 - 2²¹ = 127781921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129879077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25561 + ... + 30217.

Almost surely, 2^129879073 is an apocalyptic number.

It is an amenable number.

129879073 is a deficient number, since it is larger than the sum of its proper divisors (810433).

129879073 is an frugal number, since it uses more digits than its factorization.

129879073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4991 (or 4824 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 129879073 is about 11396.4500174396. The cubic root of 129879073 is about 506.4225784024.

The spelling of 129879073 in words is "one hundred twenty-nine million, eight hundred seventy-nine thousand, seventy-three".