129479023 has 8 divisors (see below), whose sum is σ = 130310000. Its totient is φ = 128651328.

The previous prime is 129478991. The next prime is 129479057. The reversal of 129479023 is 320974921.

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 129479023 - 2⁵ = 129478991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129479083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155773 + ... + 156601.

It is an arithmetic number, because the mean of its divisors is an integer number (16288750).

Almost surely, 2^129479023 is an apocalyptic number.

129479023 is a deficient number, since it is larger than the sum of its proper divisors (830977).

129479023 is an equidigital number, since it uses as much as digits as its factorization.

129479023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 129479023 is about 11378.8849629478. The cubic root of 129479023 is about 505.9020872690.

The spelling of 129479023 in words is "one hundred twenty-nine million, four hundred seventy-nine thousand, twenty-three".