129748679 has 4 divisors (see below), whose sum is σ = 129772776. Its totient is φ = 129724584.

The previous prime is 129748651. The next prime is 129748693. The reversal of 129748679 is 976847921.

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

It is a cyclic number.

It is not a de Polignac number, because 129748679 - 2¹⁶ = 129683143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129748679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129748699) 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 3 ways as a sum of consecutive naturals, for example, 137 + ... + 16109.

It is an arithmetic number, because the mean of its divisors is an integer number (32443194).

Almost surely, 2^129748679 is an apocalyptic number.

129748679 is a deficient number, since it is larger than the sum of its proper divisors (24097).

129748679 is an equidigital number, since it uses as much as digits as its factorization.

129748679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24096.

The product of its digits is 1524096, while the sum is 53.

The square root of 129748679 is about 11390.7277642827. The cubic root of 129748679 is about 506.2530448631.

The spelling of 129748679 in words is "one hundred twenty-nine million, seven hundred forty-eight thousand, six hundred seventy-nine".