1385443943 has 8 divisors (see below), whose sum is σ = 1494435600. Its totient is φ = 1276797888.

The previous prime is 1385443937. The next prime is 1385443949. The reversal of 1385443943 is 3493445831.

It is an interprime number because it is at equal distance from previous prime (1385443937) and next prime (1385443949).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1385443943 - 2¹⁸ = 1385181799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1385443894 and 1385443903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385443949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78038 + ... + 94131.

It is an arithmetic number, because the mean of its divisors is an integer number (186804450).

Almost surely, 2^1385443943 is an apocalyptic number.

1385443943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1385443943 is a deficient number, since it is larger than the sum of its proper divisors (108991657).

1385443943 is a wasteful number, since it uses less digits than its factorization.

1385443943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172801.

The product of its digits is 622080, while the sum is 44.

The square root of 1385443943 is about 37221.5521304526. The cubic root of 1385443943 is about 1114.7983556205.

The spelling of 1385443943 in words is "one billion, three hundred eighty-five million, four hundred forty-three thousand, nine hundred forty-three".