1387511399 has 2 divisors, whose sum is σ = 1387511400. Its totient is φ = 1387511398.

The previous prime is 1387511371. The next prime is 1387511407. The reversal of 1387511399 is 9931157831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387511399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387511329) 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, 693755699 + 693755700.

It is an arithmetic number, because the mean of its divisors is an integer number (693755700).

Almost surely, 2^1387511399 is an apocalyptic number.

1387511399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387511399 is an equidigital number, since it uses as much as digits as its factorization.

1387511399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 47.

The square root of 1387511399 is about 37249.3140742216. The cubic root of 1387511399 is about 1115.3526066125.

The spelling of 1387511399 in words is "one billion, three hundred eighty-seven million, five hundred eleven thousand, three hundred ninety-nine".