1387908311 has 2 divisors, whose sum is σ = 1387908312. Its totient is φ = 1387908310.

The previous prime is 1387908289. The next prime is 1387908317. The reversal of 1387908311 is 1138097831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1387908311 - 2³⁰ = 314166487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387908317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693954155 + 693954156.

It is an arithmetic number, because the mean of its divisors is an integer number (693954156).

Almost surely, 2^1387908311 is an apocalyptic number.

1387908311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387908311 is an equidigital number, since it uses as much as digits as its factorization.

1387908311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1387908311 is about 37254.6414692183. The cubic root of 1387908311 is about 1115.4589491930.

The spelling of 1387908311 in words is "one billion, three hundred eighty-seven million, nine hundred eight thousand, three hundred eleven".