1387943 has 2 divisors, whose sum is σ = 1387944. Its totient is φ = 1387942.

The previous prime is 1387927. The next prime is 1387961. The reversal of 1387943 is 3497831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1387943 - 2⁴ = 1387927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693971 + 693972.

It is an arithmetic number, because the mean of its divisors is an integer number (693972).

2^1387943 is an apocalyptic number.

1387943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387943 is an equidigital number, since it uses as much as digits as its factorization.

1387943 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 1387943 is about 1178.1099269593. The cubic root of 1387943 is about 111.5468242274.

The spelling of 1387943 in words is "one million, three hundred eighty-seven thousand, nine hundred forty-three".