1375388717 has 2 divisors, whose sum is σ = 1375388718. Its totient is φ = 1375388716.

The previous prime is 1375388711. The next prime is 1375388731. The reversal of 1375388717 is 7178835731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1276704361 + 98684356 = 35731^2 + 9934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375388717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1375388711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687694358 + 687694359.

It is an arithmetic number, because the mean of its divisors is an integer number (687694359).

Almost surely, 2^1375388717 is an apocalyptic number.

It is an amenable number.

1375388717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375388717 is an equidigital number, since it uses as much as digits as its factorization.

1375388717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 50.

The square root of 1375388717 is about 37086.2335240450. The cubic root of 1375388717 is about 1112.0948231533.

The spelling of 1375388717 in words is "one billion, three hundred seventy-five million, three hundred eighty-eight thousand, seven hundred seventeen".