990711317 has 2 divisors, whose sum is σ = 990711318. Its totient is φ = 990711316.

The previous prime is 990711277. The next prime is 990711391. The reversal of 990711317 is 713117099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 514337041 + 476374276 = 22679^2 + 21826^2 .

It is a cyclic number.

It is not a de Polignac number, because 990711317 - 2⁸ = 990711061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990711217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495355658 + 495355659.

It is an arithmetic number, because the mean of its divisors is an integer number (495355659).

Almost surely, 2^990711317 is an apocalyptic number.

It is an amenable number.

990711317 is a deficient number, since it is larger than the sum of its proper divisors (1).

990711317 is an equidigital number, since it uses as much as digits as its factorization.

990711317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 38.

The square root of 990711317 is about 31475.5669845676. The cubic root of 990711317 is about 996.8941359285.

The spelling of 990711317 in words is "nine hundred ninety million, seven hundred eleven thousand, three hundred seventeen".