129679073 has 4 divisors (see below), whose sum is σ = 129842580. Its totient is φ = 129515568.

The previous prime is 129679027. The next prime is 129679091. The reversal of 129679073 is 370976921.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81126049 + 48553024 = 9007^2 + 6968^2 .

It is a cyclic number.

It is not a de Polignac number, because 129679073 - 2⁸ = 129678817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129679003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80558 + ... + 82151.

It is an arithmetic number, because the mean of its divisors is an integer number (32460645).

Almost surely, 2^129679073 is an apocalyptic number.

It is an amenable number.

129679073 is a deficient number, since it is larger than the sum of its proper divisors (163507).

129679073 is an equidigital number, since it uses as much as digits as its factorization.

129679073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163506.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 129679073 is about 11387.6719745521. The cubic root of 129679073 is about 506.1624991686.

The spelling of 129679073 in words is "one hundred twenty-nine million, six hundred seventy-nine thousand, seventy-three".