1378733 has 2 divisors, whose sum is σ = 1378734. Its totient is φ = 1378732.

The previous prime is 1378721. The next prime is 1378759. The reversal of 1378733 is 3378731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1247689 + 131044 = 1117^2 + 362^2 .

It is an emirp because it is prime and its reverse (3378731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1378733 - 2⁶ = 1378669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1378733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689366 + 689367.

It is an arithmetic number, because the mean of its divisors is an integer number (689367).

2^1378733 is an apocalyptic number.

It is an amenable number.

1378733 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378733 is an equidigital number, since it uses as much as digits as its factorization.

1378733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 32.

The square root of 1378733 is about 1174.1946175997. The cubic root of 1378733 is about 111.2995453263.

The spelling of 1378733 in words is "one million, three hundred seventy-eight thousand, seven hundred thirty-three".