70049209 has 2 divisors, whose sum is σ = 70049210. Its totient is φ = 70049208.

The previous prime is 70049201. The next prime is 70049281. The reversal of 70049209 is 90294007.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64850809 + 5198400 = 8053^2 + 2280^2 .

It is an emirp because it is prime and its reverse (90294007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70049209 - 2³ = 70049201 is a prime.

It is not a weakly prime, because it can be changed into another prime (70049201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35024604 + 35024605.

It is an arithmetic number, because the mean of its divisors is an integer number (35024605).

Almost surely, 2^70049209 is an apocalyptic number.

It is an amenable number.

70049209 is a deficient number, since it is larger than the sum of its proper divisors (1).

70049209 is an equidigital number, since it uses as much as digits as its factorization.

70049209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 70049209 is about 8369.5405489190. The cubic root of 70049209 is about 412.2250808494.

The spelling of 70049209 in words is "seventy million, forty-nine thousand, two hundred nine".