1387755329 has 2 divisors, whose sum is σ = 1387755330. Its totient is φ = 1387755328.

The previous prime is 1387755293. The next prime is 1387755349. The reversal of 1387755329 is 9235577831.

Together with previous prime (1387755293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1033751104 + 354004225 = 32152^2 + 18815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387755329 - 2⁸ = 1387755073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387755349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693877664 + 693877665.

It is an arithmetic number, because the mean of its divisors is an integer number (693877665).

Almost surely, 2^1387755329 is an apocalyptic number.

It is an amenable number.

1387755329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387755329 is an equidigital number, since it uses as much as digits as its factorization.

1387755329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 50.

The square root of 1387755329 is about 37252.5882188070. The cubic root of 1387755329 is about 1115.4179639181.

The spelling of 1387755329 in words is "one billion, three hundred eighty-seven million, seven hundred fifty-five thousand, three hundred twenty-nine".