1387741139 has 2 divisors, whose sum is σ = 1387741140. Its totient is φ = 1387741138.

The previous prime is 1387741007. The next prime is 1387741153. The reversal of 1387741139 is 9311477831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1387741139 - 2²⁸ = 1119305683 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1387741139.

It is not a weakly prime, because it can be changed into another prime (1387741339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693870569 + 693870570.

It is an arithmetic number, because the mean of its divisors is an integer number (693870570).

Almost surely, 2^1387741139 is an apocalyptic number.

1387741139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387741139 is an equidigital number, since it uses as much as digits as its factorization.

1387741139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 1387741139 is about 37252.3977617549. The cubic root of 1387741139 is about 1115.4141621348.

The spelling of 1387741139 in words is "one billion, three hundred eighty-seven million, seven hundred forty-one thousand, one hundred thirty-nine".