1385665319 has 2 divisors, whose sum is σ = 1385665320. Its totient is φ = 1385665318.

The previous prime is 1385665289. The next prime is 1385665331. The reversal of 1385665319 is 9135665831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1385665319 - 2¹² = 1385661223 is a prime.

It is a super-2 number, since 2×1385665319² = 3840136752558743522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385665349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692832659 + 692832660.

It is an arithmetic number, because the mean of its divisors is an integer number (692832660).

Almost surely, 2^1385665319 is an apocalyptic number.

1385665319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385665319 is an equidigital number, since it uses as much as digits as its factorization.

1385665319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 47.

The square root of 1385665319 is about 37224.5257726677. The cubic root of 1385665319 is about 1114.8577292383.

The spelling of 1385665319 in words is "one billion, three hundred eighty-five million, six hundred sixty-five thousand, three hundred nineteen".