1388293 has 2 divisors, whose sum is σ = 1388294. Its totient is φ = 1388292.

The previous prime is 1388287. The next prime is 1388297. The reversal of 1388293 is 3928831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1214404 + 173889 = 1102^2 + 417^2 .

It is an emirp because it is prime and its reverse (3928831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1388293 - 2⁹ = 1387781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694146 + 694147.

It is an arithmetic number, because the mean of its divisors is an integer number (694147).

2^1388293 is an apocalyptic number.

It is an amenable number.

1388293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388293 is an equidigital number, since it uses as much as digits as its factorization.

1388293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 1388293 is about 1178.2584606104. The cubic root of 1388293 is about 111.5561997582.

It can be divided in two parts, 1388 and 293, that added together give a square (1681 = 41²).

The spelling of 1388293 in words is "one million, three hundred eighty-eight thousand, two hundred ninety-three".