1387266017 has 2 divisors, whose sum is σ = 1387266018. Its totient is φ = 1387266016.

The previous prime is 1387265989. The next prime is 1387266059. The reversal of 1387266017 is 7106627831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 867243601 + 520022416 = 29449^2 + 22804^2 .

It is an emirp because it is prime and its reverse (7106627831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387266017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387266077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693633008 + 693633009.

It is an arithmetic number, because the mean of its divisors is an integer number (693633009).

Almost surely, 2^1387266017 is an apocalyptic number.

It is an amenable number.

1387266017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387266017 is an equidigital number, since it uses as much as digits as its factorization.

1387266017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 1387266017 is about 37246.0201498093. The cubic root of 1387266017 is about 1115.2868525368.

The spelling of 1387266017 in words is "one billion, three hundred eighty-seven million, two hundred sixty-six thousand, seventeen".