917312947 has 2 divisors, whose sum is σ = 917312948. Its totient is φ = 917312946.

The previous prime is 917312941. The next prime is 917313017. The reversal of 917312947 is 749213719.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 917312947 - 2³ = 917312939 is a prime.

It is not a weakly prime, because it can be changed into another prime (917312941) 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, 458656473 + 458656474.

It is an arithmetic number, because the mean of its divisors is an integer number (458656474).

Almost surely, 2^917312947 is an apocalyptic number.

917312947 is a deficient number, since it is larger than the sum of its proper divisors (1).

917312947 is an equidigital number, since it uses as much as digits as its factorization.

917312947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 43.

The square root of 917312947 is about 30287.1746288755. The cubic root of 917312947 is about 971.6410196300.

The spelling of 917312947 in words is "nine hundred seventeen million, three hundred twelve thousand, nine hundred forty-seven".