789809217994 has 4 divisors (see below), whose sum is σ = 1184713826994. Its totient is φ = 394904608996.

The previous prime is 789809217949. The next prime is 789809218063. The reversal of 789809217994 is 499712908987.

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

It can be written as a sum of positive squares in only one way, i.e., 611425471969 + 178383746025 = 781937^2 + 422355^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197452304497 + ... + 197452304500.

Almost surely, 2^789809217994 is an apocalyptic number.

789809217994 is a deficient number, since it is larger than the sum of its proper divisors (394904609000).

789809217994 is a wasteful number, since it uses less digits than its factorization.

789809217994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394904608999.

The product of its (nonzero) digits is 164602368, while the sum is 73.

The spelling of 789809217994 in words is "seven hundred eighty-nine billion, eight hundred nine million, two hundred seventeen thousand, nine hundred ninety-four".