1387511329 has 2 divisors, whose sum is σ = 1387511330. Its totient is φ = 1387511328.

The previous prime is 1387511311. The next prime is 1387511339. The reversal of 1387511329 is 9231157831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1292546304 + 94965025 = 35952^2 + 9745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387511329 - 2²³ = 1379122721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1387511291 and 1387511300.

It is not a weakly prime, because it can be changed into another prime (1387511339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693755664 + 693755665.

It is an arithmetic number, because the mean of its divisors is an integer number (693755665).

Almost surely, 2^1387511329 is an apocalyptic number.

It is an amenable number.

1387511329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387511329 is an equidigital number, since it uses as much as digits as its factorization.

1387511329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 1387511329 is about 37249.3131346069. The cubic root of 1387511329 is about 1115.3525878560.

The spelling of 1387511329 in words is "one billion, three hundred eighty-seven million, five hundred eleven thousand, three hundred twenty-nine".