1385642719 has 2 divisors, whose sum is σ = 1385642720. Its totient is φ = 1385642718.

The previous prime is 1385642717. The next prime is 1385642729. The reversal of 1385642719 is 9172465831.

It is a weak prime.

It is an emirp because it is prime and its reverse (9172465831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1385642719 - 2¹ = 1385642717 is a prime.

It is a super-2 number, since 2×1385642719² = 3840011489435425922, which contains 22 as substring.

Together with 1385642717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385642717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692821359 + 692821360.

It is an arithmetic number, because the mean of its divisors is an integer number (692821360).

Almost surely, 2^1385642719 is an apocalyptic number.

1385642719 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385642719 is an equidigital number, since it uses as much as digits as its factorization.

1385642719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 1385642719 is about 37224.2222081268. Note that the first 4 decimals coincide. The cubic root of 1385642719 is about 1114.8516681495.

The spelling of 1385642719 in words is "one billion, three hundred eighty-five million, six hundred forty-two thousand, seven hundred nineteen".