789679505 has 4 divisors (see below), whose sum is σ = 947615412. Its totient is φ = 631743600.

The previous prime is 789679469. The next prime is 789679519. The reversal of 789679505 is 505976987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505976987 = 3371 ⋅150097.

It can be written as a sum of positive squares in 2 ways, for example, as 175085824 + 614593681 = 13232^2 + 24791^2 .

It is not a de Polignac number, because 789679505 - 2⁶ = 789679441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78967946 + ... + 78967955.

It is an arithmetic number, because the mean of its divisors is an integer number (236903853).

Almost surely, 2^789679505 is an apocalyptic number.

It is an amenable number.

789679505 is a deficient number, since it is larger than the sum of its proper divisors (157935907).

789679505 is a wasteful number, since it uses less digits than its factorization.

789679505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157935906.

The product of its (nonzero) digits is 4762800, while the sum is 56.

The square root of 789679505 is about 28101.2367165575. The cubic root of 789679505 is about 924.3085185191.

The spelling of 789679505 in words is "seven hundred eighty-nine million, six hundred seventy-nine thousand, five hundred five".