1388297 has 2 divisors, whose sum is σ = 1388298. Its totient is φ = 1388296.

The previous prime is 1388293. The next prime is 1388323. The reversal of 1388297 is 7928831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 781456 + 606841 = 884^2 + 779^2 .

It is an emirp because it is prime and its reverse (7928831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1388297 - 2² = 1388293 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1388297.

It is not a weakly prime, because it can be changed into another prime (1388293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694148 + 694149.

It is an arithmetic number, because the mean of its divisors is an integer number (694149).

2^1388297 is an apocalyptic number.

It is an amenable number.

1388297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388297 is an equidigital number, since it uses as much as digits as its factorization.

1388297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 1388297 is about 1178.2601580296. The cubic root of 1388297 is about 111.5563068981.

The spelling of 1388297 in words is "one million, three hundred eighty-eight thousand, two hundred ninety-seven".