917423321 has 2 divisors, whose sum is σ = 917423322. Its totient is φ = 917423320.

The previous prime is 917423317. The next prime is 917423327. The reversal of 917423321 is 123324719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 903844096 + 13579225 = 30064^2 + 3685^2 .

It is a cyclic number.

It is not a de Polignac number, because 917423321 - 2² = 917423317 is a prime.

It is not a weakly prime, because it can be changed into another prime (917423327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458711660 + 458711661.

It is an arithmetic number, because the mean of its divisors is an integer number (458711661).

Almost surely, 2^917423321 is an apocalyptic number.

It is an amenable number.

917423321 is a deficient number, since it is larger than the sum of its proper divisors (1).

917423321 is an equidigital number, since it uses as much as digits as its factorization.

917423321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 917423321 is about 30288.9966984712. The cubic root of 917423321 is about 971.6799883757.

The spelling of 917423321 in words is "nine hundred seventeen million, four hundred twenty-three thousand, three hundred twenty-one".