70691717 has 2 divisors, whose sum is σ = 70691718. Its totient is φ = 70691716.

The previous prime is 70691693. The next prime is 70691737. The reversal of 70691717 is 71719607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68128516 + 2563201 = 8254^2 + 1601^2 .

It is an emirp because it is prime and its reverse (71719607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70691717 - 2⁶ = 70691653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70691737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35345858 + 35345859.

It is an arithmetic number, because the mean of its divisors is an integer number (35345859).

Almost surely, 2^70691717 is an apocalyptic number.

It is an amenable number.

70691717 is a deficient number, since it is larger than the sum of its proper divisors (1).

70691717 is an equidigital number, since it uses as much as digits as its factorization.

70691717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18522, while the sum is 38.

The square root of 70691717 is about 8407.8366420858. The cubic root of 70691717 is about 413.4815891309.

The spelling of 70691717 in words is "seventy million, six hundred ninety-one thousand, seven hundred seventeen".