1385757829 has 2 divisors, whose sum is σ = 1385757830. Its totient is φ = 1385757828.

The previous prime is 1385757827. The next prime is 1385757847. The reversal of 1385757829 is 9287575831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1379008225 + 6749604 = 37135^2 + 2598^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385757829 - 2¹ = 1385757827 is a prime.

Together with 1385757827, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1385757829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385757827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692878914 + 692878915.

It is an arithmetic number, because the mean of its divisors is an integer number (692878915).

Almost surely, 2^1385757829 is an apocalyptic number.

It is an amenable number.

1385757829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385757829 is an equidigital number, since it uses as much as digits as its factorization.

1385757829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 55.

The square root of 1385757829 is about 37225.7683466708. The cubic root of 1385757829 is about 1114.8825387869.

The spelling of 1385757829 in words is "one billion, three hundred eighty-five million, seven hundred fifty-seven thousand, eight hundred twenty-nine".