917212407913 has 2 divisors, whose sum is σ = 917212407914. Its totient is φ = 917212407912.

The previous prime is 917212407893. The next prime is 917212407919. The reversal of 917212407913 is 319704212719.

917212407913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 550997413264 + 366214994649 = 742292^2 + 605157^2 .

It is a cyclic number.

It is not a de Polignac number, because 917212407913 - 2⁹ = 917212407401 is a prime.

It is not a weakly prime, because it can be changed into another prime (917212407919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458606203956 + 458606203957.

It is an arithmetic number, because the mean of its divisors is an integer number (458606203957).

Almost surely, 2^917212407913 is an apocalyptic number.

It is an amenable number.

917212407913 is a deficient number, since it is larger than the sum of its proper divisors (1).

917212407913 is an equidigital number, since it uses as much as digits as its factorization.

917212407913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 917212407913 in words is "nine hundred seventeen billion, two hundred twelve million, four hundred seven thousand, nine hundred thirteen".