789413921 has 4 divisors (see below), whose sum is σ = 835850052. Its totient is φ = 742977792.

The previous prime is 789413917. The next prime is 789413969. The reversal of 789413921 is 129314987.

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

It can be written as a sum of positive squares in 2 ways, for example, as 276889600 + 512524321 = 16640^2 + 22639^2 .

It is not a de Polignac number, because 789413921 - 2² = 789413917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (789403921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23218040 + ... + 23218073.

It is an arithmetic number, because the mean of its divisors is an integer number (208962513).

Almost surely, 2^789413921 is an apocalyptic number.

It is an amenable number.

789413921 is a deficient number, since it is larger than the sum of its proper divisors (46436131).

789413921 is a wasteful number, since it uses less digits than its factorization.

789413921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46436130.

The product of its digits is 108864, while the sum is 44.

The square root of 789413921 is about 28096.5108331978. The cubic root of 789413921 is about 924.2048861479.

The spelling of 789413921 in words is "seven hundred eighty-nine million, four hundred thirteen thousand, nine hundred twenty-one".