917321138429 has 2 divisors, whose sum is σ = 917321138430. Its totient is φ = 917321138428.

The previous prime is 917321138333. The next prime is 917321138501. The reversal of 917321138429 is 924831123719.

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., 841481486329 + 75839652100 = 917323^2 + 275390^2 .

It is a cyclic number.

It is not a de Polignac number, because 917321138429 - 2¹⁶ = 917321072893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (917321188429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458660569214 + 458660569215.

It is an arithmetic number, because the mean of its divisors is an integer number (458660569215).

Almost surely, 2^917321138429 is an apocalyptic number.

It is an amenable number.

917321138429 is a deficient number, since it is larger than the sum of its proper divisors (1).

917321138429 is an equidigital number, since it uses as much as digits as its factorization.

917321138429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The spelling of 917321138429 in words is "nine hundred seventeen billion, three hundred twenty-one million, one hundred thirty-eight thousand, four hundred twenty-nine".