1385559949 has 4 divisors (see below), whose sum is σ = 1389216160. Its totient is φ = 1381903740.

The previous prime is 1385559943. The next prime is 1385559961. The reversal of 1385559949 is 9499555831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9499555831 = 71 ⋅133796561.

It is a cyclic number.

It is not a de Polignac number, because 1385559949 - 2¹³ = 1385551757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1385559893 and 1385559902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385559943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1827537 + ... + 1828294.

It is an arithmetic number, because the mean of its divisors is an integer number (347304040).

Almost surely, 2^1385559949 is an apocalyptic number.

It is an amenable number.

1385559949 is a deficient number, since it is larger than the sum of its proper divisors (3656211).

1385559949 is an equidigital number, since it uses as much as digits as its factorization.

1385559949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656210.

The product of its digits is 8748000, while the sum is 58.

The square root of 1385559949 is about 37223.1104154395. The cubic root of 1385559949 is about 1114.8294695195.

The spelling of 1385559949 in words is "one billion, three hundred eighty-five million, five hundred fifty-nine thousand, nine hundred forty-nine".