1388773 has 2 divisors, whose sum is σ = 1388774. Its totient is φ = 1388772.

The previous prime is 1388743. The next prime is 1388789. The reversal of 1388773 is 3778831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1387684 + 1089 = 1178^2 + 33^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1388773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694386 + 694387.

It is an arithmetic number, because the mean of its divisors is an integer number (694387).

2^1388773 is an apocalyptic number.

It is an amenable number.

1388773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388773 is an equidigital number, since it uses as much as digits as its factorization.

1388773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 1388773 is about 1178.4621334604. The cubic root of 1388773 is about 111.5690550671.

It can be divided in two parts, 138 and 8773, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 1388773 in words is "one million, three hundred eighty-eight thousand, seven hundred seventy-three".