789917129 has 12 divisors (see below), whose sum is σ = 834978816. Its totient is φ = 745873128.

The previous prime is 789917119. The next prime is 789917131. The reversal of 789917129 is 921719987.

It is not a de Polignac number, because 789917129 - 2⁸ = 789916873 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 (789917119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140792 + ... + 146294.

It is an arithmetic number, because the mean of its divisors is an integer number (69581568).

Almost surely, 2^789917129 is an apocalyptic number.

789917129 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

789917129 is a deficient number, since it is larger than the sum of its proper divisors (45061687).

789917129 is an equidigital number, since it uses as much as digits as its factorization.

789917129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5684 (or 5605 counting only the distinct ones).

The product of its digits is 571536, while the sum is 53.

The square root of 789917129 is about 28105.4643975153. The cubic root of 789917129 is about 924.4012210476.

The spelling of 789917129 in words is "seven hundred eighty-nine million, nine hundred seventeen thousand, one hundred twenty-nine".