70639392217 has 2 divisors, whose sum is σ = 70639392218. Its totient is φ = 70639392216.

The previous prime is 70639392179. The next prime is 70639392221. The reversal of 70639392217 is 71229393607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70049679561 + 589712656 = 264669^2 + 24284^2 .

It is a cyclic number.

It is not a de Polignac number, because 70639392217 - 2²³ = 70631003609 is a prime.

It is not a weakly prime, because it can be changed into another prime (70639392227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35319696108 + 35319696109.

It is an arithmetic number, because the mean of its divisors is an integer number (35319696109).

Almost surely, 2^70639392217 is an apocalyptic number.

It is an amenable number.

70639392217 is a deficient number, since it is larger than the sum of its proper divisors (1).

70639392217 is an equidigital number, since it uses as much as digits as its factorization.

70639392217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 49.

The spelling of 70639392217 in words is "seventy billion, six hundred thirty-nine million, three hundred ninety-two thousand, two hundred seventeen".