1386289517 has 2 divisors, whose sum is σ = 1386289518. Its totient is φ = 1386289516.

The previous prime is 1386289493. The next prime is 1386289559. The reversal of 1386289517 is 7159826831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1303643236 + 82646281 = 36106^2 + 9091^2 .

It is a cyclic number.

It is not a de Polignac number, because 1386289517 - 2¹⁸ = 1386027373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1386289717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693144758 + 693144759.

It is an arithmetic number, because the mean of its divisors is an integer number (693144759).

Almost surely, 2^1386289517 is an apocalyptic number.

It is an amenable number.

1386289517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386289517 is an equidigital number, since it uses as much as digits as its factorization.

1386289517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The square root of 1386289517 is about 37232.9090590569. The cubic root of 1386289517 is about 1115.0251067161.

The spelling of 1386289517 in words is "one billion, three hundred eighty-six million, two hundred eighty-nine thousand, five hundred seventeen".