70209189 has 12 divisors (see below), whose sum is σ = 102345100. Its totient is φ = 46376064.

The previous prime is 70209173. The next prime is 70209193. The reversal of 70209189 is 98190207.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52316289 + 17892900 = 7233^2 + 4230^2 .

It is not a de Polignac number, because 70209189 - 2⁴ = 70209173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70209149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34804 + ... + 36765.

Almost surely, 2^70209189 is an apocalyptic number.

It is an amenable number.

70209189 is a deficient number, since it is larger than the sum of its proper divisors (32135911).

70209189 is a wasteful number, since it uses less digits than its factorization.

70209189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71684 (or 71681 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 70209189 is about 8379.0923732824. The cubic root of 70209189 is about 412.5386586358.

The spelling of 70209189 in words is "seventy million, two hundred nine thousand, one hundred eighty-nine".