1387313 has 2 divisors, whose sum is σ = 1387314. Its totient is φ = 1387312.

The previous prime is 1387289. The next prime is 1387327. The reversal of 1387313 is 3137831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 734449 + 652864 = 857^2 + 808^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387313 - 2¹⁸ = 1125169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693656 + 693657.

It is an arithmetic number, because the mean of its divisors is an integer number (693657).

2^1387313 is an apocalyptic number.

It is an amenable number.

1387313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387313 is an equidigital number, since it uses as much as digits as its factorization.

1387313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 1387313 is about 1177.8425191850. The cubic root of 1387313 is about 111.5299442992.

The spelling of 1387313 in words is "one million, three hundred eighty-seven thousand, three hundred thirteen".