70008209 has 2 divisors, whose sum is σ = 70008210. Its totient is φ = 70008208.

The previous prime is 70008143. The next prime is 70008223. The reversal of 70008209 is 90280007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65044225 + 4963984 = 8065^2 + 2228^2 .

It is a cyclic number.

It is not a de Polignac number, because 70008209 - 2¹⁶ = 69942673 is a prime.

It is a super-2 number, since 2×70008209² = 9802298654775362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (70008109) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35004104 + 35004105.

It is an arithmetic number, because the mean of its divisors is an integer number (35004105).

Almost surely, 2^70008209 is an apocalyptic number.

It is an amenable number.

70008209 is a deficient number, since it is larger than the sum of its proper divisors (1).

70008209 is an equidigital number, since it uses as much as digits as its factorization.

70008209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 70008209 is about 8367.0908325415. The cubic root of 70008209 is about 412.1446396516.

The spelling of 70008209 in words is "seventy million, eight thousand, two hundred nine".