70018217 has 2 divisors, whose sum is σ = 70018218. Its totient is φ = 70018216.

The previous prime is 70018159. The next prime is 70018237. The reversal of 70018217 is 71281007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48664576 + 21353641 = 6976^2 + 4621^2 .

It is a cyclic number.

It is not a de Polignac number, because 70018217 - 2¹² = 70014121 is a prime.

It is not a weakly prime, because it can be changed into another prime (70018237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35009108 + 35009109.

It is an arithmetic number, because the mean of its divisors is an integer number (35009109).

Almost surely, 2^70018217 is an apocalyptic number.

It is an amenable number.

70018217 is a deficient number, since it is larger than the sum of its proper divisors (1).

70018217 is an equidigital number, since it uses as much as digits as its factorization.

70018217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 70018217 is about 8367.6888684989. The cubic root of 70018217 is about 412.1642780487.

The spelling of 70018217 in words is "seventy million, eighteen thousand, two hundred seventeen".