1378943 has 2 divisors, whose sum is σ = 1378944. Its totient is φ = 1378942.

The previous prime is 1378907. The next prime is 1378957. The reversal of 1378943 is 3498731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378943 - 2¹² = 1374847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689471 + 689472.

It is an arithmetic number, because the mean of its divisors is an integer number (689472).

2^1378943 is an apocalyptic number.

1378943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378943 is an equidigital number, since it uses as much as digits as its factorization.

1378943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 1378943 is about 1174.2840371903. The cubic root of 1378943 is about 111.3051958567.

The spelling of 1378943 in words is "one million, three hundred seventy-eight thousand, nine hundred forty-three".