2173685069 has 4 divisors (see below), whose sum is σ = 2226701820. Its totient is φ = 2120668320.

The previous prime is 2173685039. The next prime is 2173685071. The reversal of 2173685069 is 9605863712.

2173685069 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.

It can be written as a sum of positive squares in 2 ways, for example, as 572644900 + 1601040169 = 23930^2 + 40013^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173685069 - 2²⁸ = 1905249613 is a prime.

It is a super-2 number, since 2×2173685069² = 9449813558387069522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173685029) 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, 26508314 + ... + 26508395.

It is an arithmetic number, because the mean of its divisors is an integer number (556675455).

Almost surely, 2^2173685069 is an apocalyptic number.

It is an amenable number.

2173685069 is a deficient number, since it is larger than the sum of its proper divisors (53016751).

2173685069 is an equidigital number, since it uses as much as digits as its factorization.

2173685069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53016750.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 2173685069 is about 46622.7955940010. The cubic root of 2173685069 is about 1295.3850306340.

The spelling of 2173685069 in words is "two billion, one hundred seventy-three million, six hundred eighty-five thousand, sixty-nine".