70907917 has 2 divisors, whose sum is σ = 70907918. Its totient is φ = 70907916.

The previous prime is 70907899. The next prime is 70907923. The reversal of 70907917 is 71970907.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58155876 + 12752041 = 7626^2 + 3571^2 .

It is a cyclic number.

It is not a de Polignac number, because 70907917 - 2¹¹ = 70905869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70907917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70907927) 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, 35453958 + 35453959.

It is an arithmetic number, because the mean of its divisors is an integer number (35453959).

Almost surely, 2^70907917 is an apocalyptic number.

It is an amenable number.

70907917 is a deficient number, since it is larger than the sum of its proper divisors (1).

70907917 is an equidigital number, since it uses as much as digits as its factorization.

70907917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27783, while the sum is 40.

The square root of 70907917 is about 8420.6838795908. The cubic root of 70907917 is about 413.9026839185.

It can be divided in two parts, 70907 and 917, that added together give a square (71824 = 268²).

The spelling of 70907917 in words is "seventy million, nine hundred seven thousand, nine hundred seventeen".