988665317 has 2 divisors, whose sum is σ = 988665318. Its totient is φ = 988665316.

The previous prime is 988665283. The next prime is 988665343. The reversal of 988665317 is 713566889.

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., 760987396 + 227677921 = 27586^2 + 15089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-988665317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988665347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494332658 + 494332659.

It is an arithmetic number, because the mean of its divisors is an integer number (494332659).

Almost surely, 2^988665317 is an apocalyptic number.

It is an amenable number.

988665317 is a deficient number, since it is larger than the sum of its proper divisors (1).

988665317 is an equidigital number, since it uses as much as digits as its factorization.

988665317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 53.

The square root of 988665317 is about 31443.0487866555. The cubic root of 988665317 is about 996.2074067537.

The spelling of 988665317 in words is "nine hundred eighty-eight million, six hundred sixty-five thousand, three hundred seventeen".