609700173889 has 3 divisors (see below), whose sum is σ = 609700954723. Its totient is φ = 609699393056.

The previous prime is 609700173881. The next prime is 609700173913. The reversal of 609700173889 is 988371007906.

The square root of 609700173889 is 780833.

It is a perfect power (a square), and thus also a powerful number.

609700173889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 547503804225 + 62196369664 = 739935^2 + 249392^2 .

It is not a de Polignac number, because 609700173889 - 2³ = 609700173881 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (609700173881) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 390417 + ... + 1171249.

Almost surely, 2^609700173889 is an apocalyptic number.

609700173889 is the 780833-rd square number.

609700173889 is the 390417-th centered octagonal number.

It is an amenable number.

609700173889 is a deficient number, since it is larger than the sum of its proper divisors (780834).

609700173889 is an frugal number, since it uses more digits than its factorization.

609700173889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561666 (or 780833 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 609700173889 in words is "six hundred nine billion, seven hundred million, one hundred seventy-three thousand, eight hundred eighty-nine".