1385743841 has 2 divisors, whose sum is σ = 1385743842. Its totient is φ = 1385743840.

The previous prime is 1385743837. The next prime is 1385743861. The reversal of 1385743841 is 1483475831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 788430241 + 597313600 = 28079^2 + 24440^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385743841 - 2² = 1385743837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1385743792 and 1385743801.

It is not a weakly prime, because it can be changed into another prime (1385743861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692871920 + 692871921.

It is an arithmetic number, because the mean of its divisors is an integer number (692871921).

Almost surely, 2^1385743841 is an apocalyptic number.

It is an amenable number.

1385743841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385743841 is an equidigital number, since it uses as much as digits as its factorization.

1385743841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 44.

The square root of 1385743841 is about 37225.5804655884. The cubic root of 1385743841 is about 1114.8787875232.

The spelling of 1385743841 in words is "one billion, three hundred eighty-five million, seven hundred forty-three thousand, eight hundred forty-one".