70190209 has 2 divisors, whose sum is σ = 70190210. Its totient is φ = 70190208.

The previous prime is 70190207. The next prime is 70190213. The reversal of 70190209 is 90209107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42941809 + 27248400 = 6553^2 + 5220^2 .

It is an emirp because it is prime and its reverse (90209107) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70190209 - 2¹ = 70190207 is a prime.

Together with 70190207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (70190207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35095104 + 35095105.

It is an arithmetic number, because the mean of its divisors is an integer number (35095105).

Almost surely, 2^70190209 is an apocalyptic number.

It is an amenable number.

70190209 is a deficient number, since it is larger than the sum of its proper divisors (1).

70190209 is an equidigital number, since it uses as much as digits as its factorization.

70190209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 70190209 is about 8377.9597158258. The cubic root of 70190209 is about 412.5014807415.

The spelling of 70190209 in words is "seventy million, one hundred ninety thousand, two hundred nine".