1708638313 has 2 divisors, whose sum is σ = 1708638314. Its totient is φ = 1708638312.

The previous prime is 1708638301. The next prime is 1708638317. The reversal of 1708638313 is 3138368071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1589457424 + 119180889 = 39868^2 + 10917^2 .

It is an emirp because it is prime and its reverse (3138368071) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1708638313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1708638317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 854319156 + 854319157.

It is an arithmetic number, because the mean of its divisors is an integer number (854319157).

Almost surely, 2^1708638313 is an apocalyptic number.

It is an amenable number.

1708638313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1708638313 is an equidigital number, since it uses as much as digits as its factorization.

1708638313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 1708638313 is about 41335.6784509460. The cubic root of 1708638313 is about 1195.5012837114.

The spelling of 1708638313 in words is "one billion, seven hundred eight million, six hundred thirty-eight thousand, three hundred thirteen".