70238209 has 2 divisors, whose sum is σ = 70238210. Its totient is φ = 70238208.

The previous prime is 70238171. The next prime is 70238213. The reversal of 70238209 is 90283207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65658609 + 4579600 = 8103^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 70238209 - 2⁹ = 70237697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70238279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35119104 + 35119105.

It is an arithmetic number, because the mean of its divisors is an integer number (35119105).

It is a Proth number, since it is equal to 4287 ⋅ 2¹⁴ + 1 and 4287 < 2¹⁴.

Almost surely, 2^70238209 is an apocalyptic number.

It is an amenable number.

70238209 is a deficient number, since it is larger than the sum of its proper divisors (1).

70238209 is an equidigital number, since it uses as much as digits as its factorization.

70238209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 70238209 is about 8380.8238855139. The cubic root of 70238209 is about 412.5954898615.

The spelling of 70238209 in words is "seventy million, two hundred thirty-eight thousand, two hundred nine".