789899 has 4 divisors (see below), whose sum is σ = 861720. Its totient is φ = 718080.

The previous prime is 789883. The next prime is 789941. The reversal of 789899 is 998987.

Added to its reverse (998987) it gives a triangular number (1788886 = T₁₈₉₁).

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

It is not a de Polignac number, because 789899 - 2⁴ = 789883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (789829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35894 + ... + 35915.

It is an arithmetic number, because the mean of its divisors is an integer number (215430).

2⁷⁸⁹⁸⁹⁹ is an apocalyptic number.

789899 is a deficient number, since it is larger than the sum of its proper divisors (71821).

789899 is a wasteful number, since it uses less digits than its factorization.

789899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71820.

The product of its digits is 326592, while the sum is 50.

The square root of 789899 is about 888.7626229765. The cubic root of 789899 is about 92.4394149167.

Adding to 789899 its reverse (998987), we get a triangular number (1788886 = T₁₈₉₁).

It can be divided in two parts, 7898 and 99, that added together give a palindrome (7997).

The spelling of 789899 in words is "seven hundred eighty-nine thousand, eight hundred ninety-nine".