129788445 has 8 divisors (see below), whose sum is σ = 207661536. Its totient is φ = 69220496.

The previous prime is 129788423. The next prime is 129788459. The reversal of 129788445 is 544887921.

It is a happy number.

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 129788445 - 2⁸ = 129788189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129788394 and 129788403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4326267 + ... + 4326296.

It is an arithmetic number, because the mean of its divisors is an integer number (25957692).

Almost surely, 2^129788445 is an apocalyptic number.

129788445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129788445 is a deficient number, since it is larger than the sum of its proper divisors (77873091).

129788445 is an equidigital number, since it uses as much as digits as its factorization.

129788445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8652571.

The product of its digits is 645120, while the sum is 48.

The square root of 129788445 is about 11392.4731731086. The cubic root of 129788445 is about 506.3047592040.

The spelling of 129788445 in words is "one hundred twenty-nine million, seven hundred eighty-eight thousand, four hundred forty-five".